From 5c2823e3f1bc8605830b41a51f0d3f6ca5054844 Mon Sep 17 00:00:00 2001
From: Pierre Rudloff <contact@rudloff.pro>
Date: Sun, 21 Jun 2020 01:44:20 +0200
Subject: [PATCH 1/2] Move Video class to a separate library + improve error
 handling + youtube-dl update

---
 README.md                                     |  28 +-
 classes/Config.php                            |  54 +-
 classes/UglyRouter.php                        |   1 -
 classes/Video.php                             | 647 ------------------
 classes/exceptions/ConfigException.php        |  10 +
 classes/exceptions/EmptyUrlException.php      |  16 -
 classes/exceptions/PasswordException.php      |  16 -
 .../ConvertedPlaylistArchiveStream.php        |   8 +-
 classes/streams/PlaylistArchiveStream.php     |  28 +-
 classes/streams/YoutubeStream.php             |  16 +-
 composer.json                                 |   9 +-
 composer.lock                                 |  81 ++-
 controllers/BaseController.php                |  28 +-
 controllers/DownloadController.php            | 156 +++--
 controllers/FrontController.php               |  65 +-
 controllers/JsonController.php                |  19 +-
 i18n/template.pot                             | 227 +++---
 templates/error.tpl                           |   2 +-
 tests/BaseTest.php                            |   4 +-
 tests/ConfigTest.php                          |  18 +-
 tests/ControllerTest.php                      |   5 +-
 tests/ConvertedPlaylistArchiveStreamTest.php  |  12 +-
 tests/DownloadControllerTest.php              |  29 +-
 tests/FrontControllerTest.php                 |  22 +-
 tests/JsonControllerTest.php                  |   9 +-
 tests/PlaylistArchiveStreamTest.php           |  12 +-
 tests/VideoStubsTest.php                      |  54 +-
 tests/VideoTest.php                           | 198 +++---
 tests/YoutubeChunkStreamTest.php              |  14 +-
 tests/YoutubeStreamTest.php                   |  13 +-
 30 files changed, 649 insertions(+), 1152 deletions(-)
 delete mode 100644 classes/Video.php
 create mode 100644 classes/exceptions/ConfigException.php
 delete mode 100644 classes/exceptions/EmptyUrlException.php
 delete mode 100644 classes/exceptions/PasswordException.php

diff --git a/README.md b/README.md
index a310a85..9b60df9 100644
--- a/README.md
+++ b/README.md
@@ -148,32 +148,8 @@ so that it points to your ffmpeg/avconv binary (`/usr/bin/avconv` on Debian/Ubun
 
 ## Use as library
 
-AllTube can also be used as a library to extract a video URL from a webpage.
-
-You can install it with:
-
-```bash
-composer require rudloff/alltube
-```
-
-You can then use it in your PHP code:
-
-```php
-use Alltube\Config;
-use Alltube\Video;
-
-require_once __DIR__.'/vendor/autoload.php';
-
-Config::setOptions(
-    [
-        'youtubedl' => '/usr/local/bin/youtube-dl',
-    ]
-);
-$video = new Video('https://www.youtube.com/watch?v=dQw4w9WgXcQ');
-$video->getUrl();
-```
-
-You can also have a look at this [example project](https://github.com/Rudloff/alltube-example-project).
+The `Video` class is now available as [a separate package](https://packagist.org/packages/rudloff/alltube-library)
+so that you can reuse it in your projects.
 
 ## JSON API
 
diff --git a/classes/Config.php b/classes/Config.php
index e308218..337192a 100644
--- a/classes/Config.php
+++ b/classes/Config.php
@@ -6,7 +6,8 @@
 
 namespace Alltube;
 
-use Exception;
+use Alltube\Exception\ConfigException;
+use Alltube\Library\Downloader;
 use Jawira\CaseConverter\CaseConverterException;
 use Symfony\Component\ErrorHandler\Debug;
 use Symfony\Component\Yaml\Yaml;
@@ -141,7 +142,7 @@ class Config
      * Config constructor.
      *
      * @param mixed[] $options Options
-     * @throws CaseConverterException
+     * @throws ConfigException
      */
     private function __construct(array $options = [])
     {
@@ -197,20 +198,15 @@ class Config
      * Throw an exception if some of the options are invalid.
      *
      * @return void
-     * @throws Exception If Python is missing
-     *
-     * @throws Exception If youtube-dl is missing
+     * @throws ConfigException If Python is missing
+     * @throws ConfigException If youtube-dl is missing
      */
     private function validateOptions()
     {
-        /*
-        We don't translate these exceptions because they usually occur before Slim can catch them
-        so they will go to the logs.
-         */
         if (!is_file($this->youtubedl)) {
-            throw new Exception("Can't find youtube-dl at " . $this->youtubedl);
-        } elseif (!Video::checkCommand([$this->python, '--version'])) {
-            throw new Exception("Can't find Python at " . $this->python);
+            throw new ConfigException("Can't find youtube-dl at " . $this->youtubedl);
+        } elseif (!Downloader::checkCommand([$this->python, '--version'])) {
+            throw new ConfigException("Can't find Python at " . $this->python);
         }
 
         if (!class_exists(Debug::class)) {
@@ -241,13 +237,18 @@ class Config
      * If the value is an array, you should use the YAML format: "CONVERT_ADVANCED_FORMATS='[foo, bar]'"
      *
      * @return void
-     * @throws CaseConverterException
+     * @throws ConfigException
      */
     private function getEnv()
     {
         foreach (get_object_vars($this) as $prop => $value) {
-            $convert = new Convert($prop);
-            $env = getenv($convert->toMacro());
+            try {
+                $convert = new Convert($prop);
+                $env = getenv($convert->toMacro());
+            } catch (CaseConverterException $e) {
+                // This should not happen.
+                throw new ConfigException('Could not parse option name: ' . $prop, $e->getCode(), $e);
+            }
             if ($env) {
                 $this->$prop = Yaml::parse($env);
             }
@@ -273,7 +274,7 @@ class Config
      *
      * @param string $file Path to the YAML file
      * @return void
-     * @throws Exception
+     * @throws ConfigException
      */
     public static function setFile($file)
     {
@@ -282,7 +283,7 @@ class Config
             self::$instance = new self($options);
             self::$instance->validateOptions();
         } else {
-            throw new Exception("Can't find config file at " . $file);
+            throw new ConfigException("Can't find config file at " . $file);
         }
     }
 
@@ -292,7 +293,7 @@ class Config
      * @param mixed[] $options Options (see `config/config.example.yml` for available options)
      * @param bool $update True to update an existing instance
      * @return void
-     * @throws Exception
+     * @throws ConfigException
      */
     public static function setOptions(array $options, $update = true)
     {
@@ -314,4 +315,21 @@ class Config
     {
         self::$instance = null;
     }
+
+    /**
+     * Return a downloader object with the current config.
+     *
+     * @return Downloader
+     */
+    public function getDownloader()
+    {
+        return new Downloader(
+            $this->youtubedl,
+            $this->params,
+            $this->python,
+            $this->avconv,
+            $this->phantomjsDir,
+            $this->avconvVerbosity
+        );
+    }
 }
diff --git a/classes/UglyRouter.php b/classes/UglyRouter.php
index f03efe7..a5b1020 100644
--- a/classes/UglyRouter.php
+++ b/classes/UglyRouter.php
@@ -48,7 +48,6 @@ class UglyRouter extends Router
      *
      * @return string
      * @throws InvalidArgumentException If required data not provided
-     *
      * @throws RuntimeException         If named route does not exist
      */
     public function pathFor($name, array $data = [], array $queryParams = [])
diff --git a/classes/Video.php b/classes/Video.php
deleted file mode 100644
index 38c9287..0000000
--- a/classes/Video.php
+++ /dev/null
@@ -1,647 +0,0 @@
-<?php
-
-/**
- * VideoDownload class.
- */
-
-namespace Alltube;
-
-use Alltube\Exception\EmptyUrlException;
-use Alltube\Exception\PasswordException;
-use Exception;
-use GuzzleHttp\Client;
-use Psr\Http\Message\ResponseInterface;
-use stdClass;
-use Symfony\Component\Process\Process;
-
-/**
- * Extract info about videos.
- *
- * Due to the way youtube-dl behaves, this class can also contain information about a playlist.
- *
- * @property-read string $title         Title
- * @property-read string $protocol      Network protocol (HTTP, RTMP, etc.)
- * @property-read string $url           File URL
- * @property-read string $ext           File extension
- * @property-read string $extractor_key youtube-dl extractor class used
- * @property-read array $entries       List of videos (if the object contains information about a playlist)
- * @property-read array $rtmp_conn
- * @property-read string|null $_type         Object type (usually "playlist" or null)
- * @property-read stdClass $downloader_options
- * @property-read stdClass $http_headers
- */
-class Video
-{
-    /**
-     * Config instance.
-     *
-     * @var Config
-     */
-    private $config;
-
-    /**
-     * URL of the page containing the video.
-     *
-     * @var string
-     */
-    private $webpageUrl;
-
-    /**
-     * Requested video format.
-     *
-     * @var string
-     */
-    private $requestedFormat;
-
-    /**
-     * Password.
-     *
-     * @var string|null
-     */
-    private $password;
-
-    /**
-     * JSON object returned by youtube-dl.
-     *
-     * @var stdClass
-     */
-    private $json;
-
-    /**
-     * URLs of the video files.
-     *
-     * @var string[]
-     */
-    private $urls;
-
-    /**
-     * LocaleManager instance.
-     *
-     * @var LocaleManager
-     */
-    protected $localeManager;
-
-    /**
-     * VideoDownload constructor.
-     *
-     * @param string $webpageUrl URL of the page containing the video
-     * @param string $requestedFormat Requested video format
-     *                                (can be any format string accepted by youtube-dl,
-     *                                including selectors like "[height<=720]")
-     * @param string $password Password
-     */
-    public function __construct($webpageUrl, $requestedFormat = 'best/bestvideo', $password = null)
-    {
-        $this->webpageUrl = $webpageUrl;
-        $this->requestedFormat = $requestedFormat;
-        $this->password = $password;
-        $this->config = Config::getInstance();
-
-        $this->localeManager = LocaleManager::getInstance();
-    }
-
-    /**
-     * Return a youtube-dl process with the specified arguments.
-     *
-     * @param string[] $arguments Arguments
-     *
-     * @return Process<string>
-     */
-    private static function getProcess(array $arguments)
-    {
-        $config = Config::getInstance();
-
-        return new Process(
-            array_merge(
-                [$config->python, $config->youtubedl],
-                $config->params,
-                $arguments
-            )
-        );
-    }
-
-    /**
-     * List all extractors.
-     *
-     * @return string[] Extractors
-     *
-     * @throws PasswordException
-     */
-    public static function getExtractors()
-    {
-        $video = new self('');
-
-        return explode("\n", trim($video->callYoutubedl(['--list-extractors'])));
-    }
-
-    /**
-     * Call youtube-dl.
-     *
-     * @param string[] $arguments Arguments
-     *
-     * @return string Result
-     * @throws Exception         If the password is wrong
-     * @throws Exception         If youtube-dl returns an error
-     *
-     * @throws PasswordException If the video is protected by a password and no password was specified
-     */
-    private function callYoutubedl(array $arguments)
-    {
-        $config = Config::getInstance();
-
-        $process = self::getProcess($arguments);
-        //This is needed by the openload extractor because it runs PhantomJS
-        $process->setEnv(['PATH' => $config->phantomjsDir]);
-        $process->run();
-        if (!$process->isSuccessful()) {
-            $errorOutput = trim($process->getErrorOutput());
-            $exitCode = intval($process->getExitCode());
-            if ($errorOutput == 'ERROR: This video is protected by a password, use the --video-password option') {
-                throw new PasswordException($errorOutput, $exitCode);
-            } elseif (substr($errorOutput, 0, 21) == 'ERROR: Wrong password') {
-                throw new Exception($this->localeManager->t('Wrong password'), $exitCode);
-            } else {
-                throw new Exception($errorOutput, $exitCode);
-            }
-        } else {
-            return trim($process->getOutput());
-        }
-    }
-
-    /**
-     * Get a property from youtube-dl.
-     *
-     * @param string $prop Property
-     *
-     * @return string
-     * @throws PasswordException
-     */
-    private function getProp($prop = 'dump-json')
-    {
-        $arguments = ['--' . $prop];
-
-        if (isset($this->webpageUrl)) {
-            $arguments[] = $this->webpageUrl;
-        }
-        if (isset($this->requestedFormat)) {
-            $arguments[] = '-f';
-            $arguments[] = $this->requestedFormat;
-        }
-        if (isset($this->password)) {
-            $arguments[] = '--video-password';
-            $arguments[] = $this->password;
-        }
-
-        return $this->callYoutubedl($arguments);
-    }
-
-    /**
-     * Get all information about a video.
-     *
-     * @return stdClass Decoded JSON
-     *
-     * @throws PasswordException
-     */
-    public function getJson()
-    {
-        if (!isset($this->json)) {
-            $this->json = json_decode($this->getProp('dump-single-json'));
-        }
-
-        return $this->json;
-    }
-
-    /**
-     * Magic method to get a property from the JSON object returned by youtube-dl.
-     *
-     * @param string $name Property
-     *
-     * @return mixed
-     * @throws PasswordException
-     */
-    public function __get($name)
-    {
-        if (isset($this->$name)) {
-            return $this->getJson()->$name;
-        }
-
-        return null;
-    }
-
-    /**
-     * Magic method to check if the JSON object returned by youtube-dl has a property.
-     *
-     * @param string $name Property
-     *
-     * @return bool
-     * @throws PasswordException
-     */
-    public function __isset($name)
-    {
-        return isset($this->getJson()->$name);
-    }
-
-    /**
-     * Get URL of video from URL of page.
-     *
-     * It generally returns only one URL.
-     * But it can return two URLs when multiple formats are specified
-     * (eg. bestvideo+bestaudio).
-     *
-     * @return string[] URLs of video
-     * @throws EmptyUrlException
-     * @throws PasswordException
-     */
-    public function getUrl()
-    {
-        // Cache the URLs.
-        if (!isset($this->urls)) {
-            $this->urls = explode("\n", $this->getProp('get-url'));
-
-            if (empty($this->urls[0])) {
-                throw new EmptyUrlException($this->localeManager->t('youtube-dl returned an empty URL.'));
-            }
-        }
-
-        return $this->urls;
-    }
-
-    /**
-     * Get filename of video file from URL of page.
-     *
-     * @return string Filename of extracted video
-     *
-     * @throws PasswordException
-     */
-    public function getFilename()
-    {
-        return trim($this->getProp('get-filename'));
-    }
-
-    /**
-     * Get filename of video with the specified extension.
-     *
-     * @param string $extension New file extension
-     *
-     * @return string Filename of extracted video with specified extension
-     * @throws PasswordException
-     */
-    public function getFileNameWithExtension($extension)
-    {
-        return str_replace('.' . $this->ext, '.' . $extension, $this->getFilename());
-    }
-
-    /**
-     * Return arguments used to run rtmp for a specific video.
-     *
-     * @return string[] Arguments
-     */
-    private function getRtmpArguments()
-    {
-        $arguments = [];
-
-        if ($this->protocol == 'rtmp') {
-            foreach (
-                [
-                    'url' => '-rtmp_tcurl',
-                    'webpage_url' => '-rtmp_pageurl',
-                    'player_url' => '-rtmp_swfverify',
-                    'flash_version' => '-rtmp_flashver',
-                    'play_path' => '-rtmp_playpath',
-                    'app' => '-rtmp_app',
-                ] as $property => $option
-            ) {
-                if (isset($this->{$property})) {
-                    $arguments[] = $option;
-                    $arguments[] = $this->{$property};
-                }
-            }
-
-            if (isset($this->rtmp_conn)) {
-                foreach ($this->rtmp_conn as $conn) {
-                    $arguments[] = '-rtmp_conn';
-                    $arguments[] = $conn;
-                }
-            }
-        }
-
-        return $arguments;
-    }
-
-    /**
-     * Check if a command runs successfully.
-     *
-     * @param string[] $command Command and arguments
-     *
-     * @return bool False if the command returns an error, true otherwise
-     */
-    public static function checkCommand(array $command)
-    {
-        $process = new Process($command);
-        $process->run();
-
-        return $process->isSuccessful();
-    }
-
-    /**
-     * Get a process that runs avconv in order to convert a video.
-     *
-     * @param int $audioBitrate Audio bitrate of the converted file
-     * @param string $filetype Filetype of the converted file
-     * @param bool $audioOnly True to return an audio-only file
-     * @param string $from Start the conversion at this time
-     * @param string $to End the conversion at this time
-     *
-     * @return Process<string> Process
-     * @throws Exception If avconv/ffmpeg is missing
-     *
-     */
-    private function getAvconvProcess(
-        $audioBitrate,
-        $filetype = 'mp3',
-        $audioOnly = true,
-        $from = null,
-        $to = null
-    ) {
-        if (!$this->checkCommand([$this->config->avconv, '-version'])) {
-            throw new Exception(
-                $this->localeManager->t(
-                    "Can't find avconv or ffmpeg at @path.",
-                    ['@path' => $this->config->avconv]
-                )
-            );
-        }
-
-        $durationRegex = '/(\d+:)?(\d+:)?(\d+)/';
-
-        $afterArguments = [];
-
-        if ($audioOnly) {
-            $afterArguments[] = '-vn';
-        }
-
-        if (!empty($from)) {
-            if (!preg_match($durationRegex, $from)) {
-                throw new Exception($this->localeManager->t('Invalid start time: @from.', ['@from' => $from]));
-            }
-            $afterArguments[] = '-ss';
-            $afterArguments[] = $from;
-        }
-        if (!empty($to)) {
-            if (!preg_match($durationRegex, $to)) {
-                throw new Exception($this->localeManager->t('Invalid end time: @to.', ['@to' => $to]));
-            }
-            $afterArguments[] = '-to';
-            $afterArguments[] = $to;
-        }
-
-        $urls = $this->getUrl();
-
-        $arguments = array_merge(
-            [
-                $this->config->avconv,
-                '-v', $this->config->avconvVerbosity,
-            ],
-            $this->getRtmpArguments(),
-            [
-                '-i', $urls[0],
-                '-f', $filetype,
-                '-b:a', $audioBitrate . 'k',
-            ],
-            $afterArguments,
-            [
-                'pipe:1',
-            ]
-        );
-
-        //Vimeo needs a correct user-agent
-        $arguments[] = '-user_agent';
-        $arguments[] = $this->getProp('dump-user-agent');
-
-        return new Process($arguments);
-    }
-
-    /**
-     * Get audio stream of converted video.
-     *
-     * @param string $from Start the conversion at this time
-     * @param string $to End the conversion at this time
-     *
-     * @return resource popen stream
-     * @throws Exception If the popen stream was not created correctly
-     *
-     * @throws Exception If your try to convert an M3U8 video
-     */
-    public function getAudioStream($from = null, $to = null)
-    {
-        if (isset($this->_type) && $this->_type == 'playlist') {
-            throw new Exception($this->localeManager->t('Conversion of playlists is not supported.'));
-        }
-
-        if (isset($this->protocol)) {
-            if (in_array($this->protocol, ['m3u8', 'm3u8_native'])) {
-                throw new Exception($this->localeManager->t('Conversion of M3U8 files is not supported.'));
-            } elseif ($this->protocol == 'http_dash_segments') {
-                throw new Exception($this->localeManager->t('Conversion of DASH segments is not supported.'));
-            }
-        }
-
-        $avconvProc = $this->getAvconvProcess($this->config->audioBitrate, 'mp3', true, $from, $to);
-
-        $stream = popen($avconvProc->getCommandLine(), 'r');
-
-        if (!is_resource($stream)) {
-            throw new Exception($this->localeManager->t('Could not open popen stream.'));
-        }
-
-        return $stream;
-    }
-
-    /**
-     * Get video stream from an M3U playlist.
-     *
-     * @return resource popen stream
-     * @throws Exception If the popen stream was not created correctly
-     *
-     * @throws Exception If avconv/ffmpeg is missing
-     */
-    public function getM3uStream()
-    {
-        if (!$this->checkCommand([$this->config->avconv, '-version'])) {
-            throw new Exception(
-                $this->localeManager->t(
-                    "Can't find avconv or ffmpeg at @path.",
-                    ['@path' => $this->config->avconv]
-                )
-            );
-        }
-
-        $urls = $this->getUrl();
-
-        $process = new Process(
-            [
-                $this->config->avconv,
-                '-v', $this->config->avconvVerbosity,
-                '-i', $urls[0],
-                '-f', $this->ext,
-                '-c', 'copy',
-                '-bsf:a', 'aac_adtstoasc',
-                '-movflags', 'frag_keyframe+empty_moov',
-                'pipe:1',
-            ]
-        );
-
-        $stream = popen($process->getCommandLine(), 'r');
-        if (!is_resource($stream)) {
-            throw new Exception($this->localeManager->t('Could not open popen stream.'));
-        }
-
-        return $stream;
-    }
-
-    /**
-     * Get an avconv stream to remux audio and video.
-     *
-     * @return resource popen stream
-     * @throws Exception If the popen stream was not created correctly
-     *
-     */
-    public function getRemuxStream()
-    {
-        $urls = $this->getUrl();
-
-        if (!isset($urls[0]) || !isset($urls[1])) {
-            throw new Exception($this->localeManager->t('This video does not have two URLs.'));
-        }
-
-        $process = new Process(
-            [
-                $this->config->avconv,
-                '-v', $this->config->avconvVerbosity,
-                '-i', $urls[0],
-                '-i', $urls[1],
-                '-c', 'copy',
-                '-map', '0:v:0',
-                '-map', '1:a:0',
-                '-f', 'matroska',
-                'pipe:1',
-            ]
-        );
-
-        $stream = popen($process->getCommandLine(), 'r');
-        if (!is_resource($stream)) {
-            throw new Exception($this->localeManager->t('Could not open popen stream.'));
-        }
-
-        return $stream;
-    }
-
-    /**
-     * Get video stream from an RTMP video.
-     *
-     * @return resource popen stream
-     * @throws Exception If the popen stream was not created correctly
-     *
-     */
-    public function getRtmpStream()
-    {
-        $urls = $this->getUrl();
-
-        $process = new Process(
-            array_merge(
-                [
-                    $this->config->avconv,
-                    '-v', $this->config->avconvVerbosity,
-                ],
-                $this->getRtmpArguments(),
-                [
-                    '-i', $urls[0],
-                    '-f', $this->ext,
-                    'pipe:1',
-                ]
-            )
-        );
-        $stream = popen($process->getCommandLine(), 'r');
-        if (!is_resource($stream)) {
-            throw new Exception($this->localeManager->t('Could not open popen stream.'));
-        }
-
-        return $stream;
-    }
-
-    /**
-     * Get the stream of a converted video.
-     *
-     * @param int $audioBitrate Audio bitrate of the converted file
-     * @param string $filetype Filetype of the converted file
-     *
-     * @return resource popen stream
-     * @throws Exception If the popen stream was not created correctly
-     *
-     * @throws Exception If your try to convert and M3U8 video
-     */
-    public function getConvertedStream($audioBitrate, $filetype)
-    {
-        if (in_array($this->protocol, ['m3u8', 'm3u8_native'])) {
-            throw new Exception($this->localeManager->t('Conversion of M3U8 files is not supported.'));
-        }
-
-        $avconvProc = $this->getAvconvProcess($audioBitrate, $filetype, false);
-
-        $stream = popen($avconvProc->getCommandLine(), 'r');
-
-        if (!is_resource($stream)) {
-            throw new Exception($this->localeManager->t('Could not open popen stream.'));
-        }
-
-        return $stream;
-    }
-
-    /**
-     * Get the same video but with another format.
-     *
-     * @param string $format New format
-     *
-     * @return Video
-     */
-    public function withFormat($format)
-    {
-        return new self($this->webpageUrl, $format, $this->password);
-    }
-
-    /**
-     * Get a HTTP response containing the video.
-     *
-     * @param mixed[] $headers HTTP headers of the request
-     *
-     * @return ResponseInterface
-     * @throws EmptyUrlException
-     * @throws PasswordException
-     * @link https://github.com/guzzle/guzzle/issues/2640
-     */
-    public function getHttpResponse(array $headers = [])
-    {
-        // IDN conversion breaks with Google hosts like https://r3---sn-25glene6.googlevideo.com/.
-        $client = new Client(['idn_conversion' => false]);
-        $urls = $this->getUrl();
-        $stream_context_options = [];
-
-        if (array_key_exists('Referer', (array)$this->http_headers)) {
-            $stream_context_options = [
-                'http' => [
-                    'header' => 'Referer: ' . $this->http_headers->Referer
-                ]
-            ];
-        }
-
-        return $client->request(
-            'GET',
-            $urls[0],
-            [
-                'stream' => true,
-                'stream_context' => $stream_context_options,
-                'headers' => array_merge((array)$this->http_headers, $headers)
-            ]
-        );
-    }
-}
diff --git a/classes/exceptions/ConfigException.php b/classes/exceptions/ConfigException.php
new file mode 100644
index 0000000..f533b35
--- /dev/null
+++ b/classes/exceptions/ConfigException.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace Alltube\Exception;
+
+use Exception;
+
+class ConfigException extends Exception
+{
+
+}
diff --git a/classes/exceptions/EmptyUrlException.php b/classes/exceptions/EmptyUrlException.php
deleted file mode 100644
index a1ba771..0000000
--- a/classes/exceptions/EmptyUrlException.php
+++ /dev/null
@@ -1,16 +0,0 @@
-<?php
-
-/**
- * EmptyUrlException class.
- */
-
-namespace Alltube\Exception;
-
-use Exception;
-
-/**
- * Exception thrown when youtube-dl returns an empty URL.
- */
-class EmptyUrlException extends Exception
-{
-}
diff --git a/classes/exceptions/PasswordException.php b/classes/exceptions/PasswordException.php
deleted file mode 100644
index 662aa3b..0000000
--- a/classes/exceptions/PasswordException.php
+++ /dev/null
@@ -1,16 +0,0 @@
-<?php
-
-/**
- * PasswordException class.
- */
-
-namespace Alltube\Exception;
-
-use Exception;
-
-/**
- * Exception thrown when a video requires a password.
- */
-class PasswordException extends Exception
-{
-}
diff --git a/classes/streams/ConvertedPlaylistArchiveStream.php b/classes/streams/ConvertedPlaylistArchiveStream.php
index c336663..c4114ea 100644
--- a/classes/streams/ConvertedPlaylistArchiveStream.php
+++ b/classes/streams/ConvertedPlaylistArchiveStream.php
@@ -6,8 +6,8 @@
 
 namespace Alltube\Stream;
 
-use Alltube\Video;
-use Exception;
+use Alltube\Library\Exception\AlltubeLibraryException;
+use Alltube\Library\Video;
 use Slim\Http\Stream;
 
 /**
@@ -21,11 +21,11 @@ class ConvertedPlaylistArchiveStream extends PlaylistArchiveStream
      * @param Video $video Video to stream
      *
      * @return void
-     * @throws Exception
+     * @throws AlltubeLibraryException
      */
     protected function startVideoStream(Video $video)
     {
-        $this->curVideoStream = new Stream($video->getAudioStream());
+        $this->curVideoStream = new Stream($this->downloader->getAudioStream($video));
 
         $this->init_file_stream_transfer(
             $video->getFileNameWithExtension('mp3'),
diff --git a/classes/streams/PlaylistArchiveStream.php b/classes/streams/PlaylistArchiveStream.php
index 2e682fb..d55e554 100644
--- a/classes/streams/PlaylistArchiveStream.php
+++ b/classes/streams/PlaylistArchiveStream.php
@@ -6,9 +6,9 @@
 
 namespace Alltube\Stream;
 
-use Alltube\Exception\EmptyUrlException;
-use Alltube\Exception\PasswordException;
-use Alltube\Video;
+use Alltube\Library\Downloader;
+use Alltube\Library\Exception\AlltubeLibraryException;
+use Alltube\Library\Video;
 use Barracuda\ArchiveStream\ZipArchive;
 use Psr\Http\Message\StreamInterface;
 
@@ -47,22 +47,32 @@ class PlaylistArchiveStream extends ZipArchive implements StreamInterface
      */
     private $isComplete = false;
 
+    /**
+     * Downloader object.
+     *
+     * @var Downloader
+     */
+    protected $downloader;
+
     /**
      * PlaylistArchiveStream constructor.
      *
      * We don't call the parent constructor because it messes up the output buffering.
      *
+     * @param Downloader $downloader Downloader object
      * @param Video $video Video/playlist to download
      * @noinspection PhpMissingParentConstructorInspection
      */
-    public function __construct(Video $video)
+    public function __construct(Downloader $downloader, Video $video)
     {
+        $this->downloader = $downloader;
+
         $buffer = fopen('php://temp', 'r+');
         if ($buffer !== false) {
             $this->buffer = $buffer;
         }
         foreach ($video->entries as $entry) {
-            $this->videos[] = new Video($entry->url);
+            $this->videos[] = $downloader->getVideo($entry->url);
         }
     }
 
@@ -244,12 +254,11 @@ class PlaylistArchiveStream extends ZipArchive implements StreamInterface
      * @param Video $video Video to stream
      *
      * @return void
-     * @throws PasswordException
-     * @throws EmptyUrlException
+     * @throws AlltubeLibraryException
      */
     protected function startVideoStream(Video $video)
     {
-        $response = $video->getHttpResponse();
+        $response = $this->downloader->getHttpResponse($video);
 
         $this->curVideoStream = $response->getBody();
         $contentLengthHeaders = $response->getHeader('Content-Length');
@@ -266,8 +275,7 @@ class PlaylistArchiveStream extends ZipArchive implements StreamInterface
      * @param int $count Number of bytes to read
      *
      * @return string|false
-     * @throws EmptyUrlException
-     * @throws PasswordException
+     * @throws AlltubeLibraryException
      */
     public function read($count)
     {
diff --git a/classes/streams/YoutubeStream.php b/classes/streams/YoutubeStream.php
index 3995d11..fdd19dd 100644
--- a/classes/streams/YoutubeStream.php
+++ b/classes/streams/YoutubeStream.php
@@ -6,9 +6,9 @@
 
 namespace Alltube\Stream;
 
-use Alltube\Exception\EmptyUrlException;
-use Alltube\Exception\PasswordException;
-use Alltube\Video;
+use Alltube\Library\Downloader;
+use Alltube\Library\Exception\AlltubeLibraryException;
+use Alltube\Library\Video;
 use GuzzleHttp\Psr7\AppendStream;
 
 /**
@@ -20,15 +20,15 @@ class YoutubeStream extends AppendStream
     /**
      * YoutubeStream constructor.
      *
+     * @param Downloader $downloader Downloader object
      * @param Video $video Video to stream
-     * @throws EmptyUrlException
-     * @throws PasswordException
+     * @throws AlltubeLibraryException
      */
-    public function __construct(Video $video)
+    public function __construct(Downloader $downloader, Video $video)
     {
         parent::__construct();
 
-        $stream = $video->getHttpResponse();
+        $stream = $downloader->getHttpResponse($video);
         $contentLenghtHeader = $stream->getHeader('Content-Length');
         $rangeStart = 0;
 
@@ -37,7 +37,7 @@ class YoutubeStream extends AppendStream
             if ($rangeEnd >= $contentLenghtHeader[0]) {
                 $rangeEnd = intval($contentLenghtHeader[0]) - 1;
             }
-            $response = $video->getHttpResponse(['Range' => 'bytes=' . $rangeStart . '-' . $rangeEnd]);
+            $response = $downloader->getHttpResponse($video, ['Range' => 'bytes=' . $rangeStart . '-' . $rangeEnd]);
             $this->addStream(new YoutubeChunkStream($response));
             $rangeStart = $rangeEnd + 1;
         }
diff --git a/composer.json b/composer.json
index 36c437b..83f059b 100644
--- a/composer.json
+++ b/composer.json
@@ -11,16 +11,15 @@
     "aura/session": "^2.1",
     "barracudanetworks/archivestream-php": "^1.0",
     "ffmpeg/ffmpeg": "^4.1",
-    "guzzlehttp/guzzle": "^6.5",
     "jawira/case-converter": "^3.4",
     "mathmarques/smarty-view": "^1.1",
     "npm-asset/open-sans-fontface": "^1.4",
     "rinvex/countries": "^6.1",
+    "rudloff/alltube-library": "^0.1.0",
     "symfony/finder": "^5.0",
-    "symfony/process": "^4.0",
     "symfony/translation": "^4.0",
     "symfony/yaml": "^4.0",
-    "ytdl-org/youtube-dl": "^2020.05",
+    "ytdl-org/youtube-dl": "^2020.06",
     "zonuexe/http-accept-language": "^0.4.1"
   },
   "require-dev": {
@@ -51,10 +50,10 @@
       "type": "package",
       "package": {
         "name": "ytdl-org/youtube-dl",
-        "version": "2020.05.08",
+        "version": "2020.06.16.1",
         "dist": {
           "type": "zip",
-          "url": "https://github.com/ytdl-org/youtube-dl/archive/2020.05.08.zip"
+          "url": "https://github.com/ytdl-org/youtube-dl/archive/2020.06.16.1.zip"
         }
       }
     },
diff --git a/composer.lock b/composer.lock
index c1459b1..d164fd2 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "5b43d7dd93a519a8edb85623fcffc639",
+    "content-hash": "dba22d2bff872c8e1310567d4336db16",
     "packages": [
         {
             "name": "anam/phantomjs-linux-x86-binary",
@@ -164,16 +164,16 @@
         },
         {
             "name": "guzzlehttp/guzzle",
-            "version": "6.5.3",
+            "version": "6.5.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/guzzle/guzzle.git",
-                "reference": "aab4ebd862aa7d04f01a4b51849d657db56d882e"
+                "reference": "9d4290de1cfd701f38099ef7e183b64b4b7b0c5e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/aab4ebd862aa7d04f01a4b51849d657db56d882e",
-                "reference": "aab4ebd862aa7d04f01a4b51849d657db56d882e",
+                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/9d4290de1cfd701f38099ef7e183b64b4b7b0c5e",
+                "reference": "9d4290de1cfd701f38099ef7e183b64b4b7b0c5e",
                 "shasum": ""
             },
             "require": {
@@ -181,7 +181,7 @@
                 "guzzlehttp/promises": "^1.0",
                 "guzzlehttp/psr7": "^1.6.1",
                 "php": ">=5.5",
-                "symfony/polyfill-intl-idn": "^1.11"
+                "symfony/polyfill-intl-idn": "^1.17.0"
             },
             "require-dev": {
                 "ext-curl": "*",
@@ -227,7 +227,7 @@
                 "rest",
                 "web service"
             ],
-            "time": "2020-04-18T10:38:46+00:00"
+            "time": "2020-06-16T21:01:06+00:00"
         },
         {
             "name": "guzzlehttp/promises",
@@ -790,6 +790,47 @@
             ],
             "time": "2020-03-13T18:04:45+00:00"
         },
+        {
+            "name": "rudloff/alltube-library",
+            "version": "0.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/Rudloff/alltube-library.git",
+                "reference": "09b47e0cf3157a79724177d6cadac8cee8cae588"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/Rudloff/alltube-library/zipball/09b47e0cf3157a79724177d6cadac8cee8cae588",
+                "reference": "09b47e0cf3157a79724177d6cadac8cee8cae588",
+                "shasum": ""
+            },
+            "require": {
+                "ext-json": "*",
+                "guzzlehttp/guzzle": "^6.5",
+                "symfony/process": "^4.0|^5.0"
+            },
+            "require-dev": {
+                "phpro/grumphp": "^0.18.0",
+                "phpstan/phpstan": "^0.12.29",
+                "roave/security-advisories": "dev-master",
+                "squizlabs/php_codesniffer": "^3.5",
+                "symfony/var-dumper": "^5.1"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Alltube\\Library\\": "classes/",
+                    "Alltube\\Library\\Exception\\": "classes/exceptions/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "GPL-3.0-only"
+            ],
+            "description": "PHP wrapper for youtube-dl",
+            "homepage": "http://alltubedownload.net/",
+            "time": "2020-06-21T12:25:10+00:00"
+        },
         {
             "name": "slim/slim",
             "version": "3.12.3",
@@ -1146,16 +1187,16 @@
         },
         {
             "name": "symfony/polyfill-php72",
-            "version": "v1.13.1",
+            "version": "v1.17.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-php72.git",
-                "reference": "66fea50f6cb37a35eea048d75a7d99a45b586038"
+                "reference": "f048e612a3905f34931127360bdd2def19a5e582"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-php72/zipball/66fea50f6cb37a35eea048d75a7d99a45b586038",
-                "reference": "66fea50f6cb37a35eea048d75a7d99a45b586038",
+                "url": "https://api.github.com/repos/symfony/polyfill-php72/zipball/f048e612a3905f34931127360bdd2def19a5e582",
+                "reference": "f048e612a3905f34931127360bdd2def19a5e582",
                 "shasum": ""
             },
             "require": {
@@ -1164,7 +1205,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.13-dev"
+                    "dev-master": "1.17-dev"
                 }
             },
             "autoload": {
@@ -1197,20 +1238,20 @@
                 "portable",
                 "shim"
             ],
-            "time": "2019-11-27T13:56:44+00:00"
+            "time": "2020-05-12T16:47:27+00:00"
         },
         {
             "name": "symfony/process",
-            "version": "v4.4.8",
+            "version": "v4.4.10",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/process.git",
-                "reference": "4b6a9a4013baa65d409153cbb5a895bf093dc7f4"
+                "reference": "c714958428a85c86ab97e3a0c96db4c4f381b7f5"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/process/zipball/4b6a9a4013baa65d409153cbb5a895bf093dc7f4",
-                "reference": "4b6a9a4013baa65d409153cbb5a895bf093dc7f4",
+                "url": "https://api.github.com/repos/symfony/process/zipball/c714958428a85c86ab97e3a0c96db4c4f381b7f5",
+                "reference": "c714958428a85c86ab97e3a0c96db4c4f381b7f5",
                 "shasum": ""
             },
             "require": {
@@ -1246,7 +1287,7 @@
             ],
             "description": "Symfony Process Component",
             "homepage": "https://symfony.com",
-            "time": "2020-04-15T15:56:18+00:00"
+            "time": "2020-05-30T20:06:45+00:00"
         },
         {
             "name": "symfony/translation",
@@ -1442,10 +1483,10 @@
         },
         {
             "name": "ytdl-org/youtube-dl",
-            "version": "2020.05.08",
+            "version": "2020.06.16.1",
             "dist": {
                 "type": "zip",
-                "url": "https://github.com/ytdl-org/youtube-dl/archive/2020.05.08.zip"
+                "url": "https://github.com/ytdl-org/youtube-dl/archive/2020.06.16.1.zip"
             },
             "type": "library"
         },
diff --git a/controllers/BaseController.php b/controllers/BaseController.php
index bf48a24..05d3eb2 100644
--- a/controllers/BaseController.php
+++ b/controllers/BaseController.php
@@ -7,12 +7,14 @@
 namespace Alltube\Controller;
 
 use Alltube\Config;
+use Alltube\Library\Downloader;
+use Alltube\Library\Video;
 use Alltube\LocaleManager;
 use Alltube\SessionManager;
-use Alltube\Video;
 use Aura\Session\Segment;
 use Psr\Container\ContainerInterface;
 use Slim\Http\Request;
+use Slim\Http\Response;
 
 /**
  * Abstract class used by every controller.
@@ -61,6 +63,13 @@ abstract class BaseController
      */
     protected $localeManager;
 
+    /**
+     * Downloader instance.
+     *
+     * @var Downloader
+     */
+    protected $downloader;
+
     /**
      * BaseController constructor.
      *
@@ -73,6 +82,7 @@ abstract class BaseController
         $session = SessionManager::getSession();
         $this->sessionSegment = $session->getSegment(self::class);
         $this->localeManager = $this->container->get('locale');
+        $this->downloader = $this->config->getDownloader();
 
         if (!$this->config->stream) {
             // Force HTTP if stream is not enabled.
@@ -117,4 +127,20 @@ abstract class BaseController
 
         return $password;
     }
+
+    /**
+     * Display an user-friendly error.
+     *
+     * @param Request $request PSR-7 request
+     * @param Response $response PSR-7 response
+     * @param string $message Error message
+     *
+     * @return Response HTTP response
+     */
+    protected function displayError(Request $request, Response $response, $message)
+    {
+        $controller = new FrontController($this->container);
+
+        return $controller->displayError($request, $response, $message);
+    }
 }
diff --git a/controllers/DownloadController.php b/controllers/DownloadController.php
index 30f1e27..dd3e46f 100644
--- a/controllers/DownloadController.php
+++ b/controllers/DownloadController.php
@@ -6,13 +6,19 @@
 
 namespace Alltube\Controller;
 
-use Alltube\Exception\EmptyUrlException;
-use Alltube\Exception\PasswordException;
+use Alltube\Config;
+use Alltube\Library\Exception\EmptyUrlException;
+use Alltube\Library\Exception\InvalidProtocolConversionException;
+use Alltube\Library\Exception\PasswordException;
+use Alltube\Library\Exception\AlltubeLibraryException;
+use Alltube\Library\Exception\PlaylistConversionException;
+use Alltube\Library\Exception\PopenStreamException;
+use Alltube\Library\Exception\RemuxException;
+use Alltube\Library\Exception\WrongPasswordException;
+use Alltube\Library\Exception\YoutubedlException;
 use Alltube\Stream\ConvertedPlaylistArchiveStream;
 use Alltube\Stream\PlaylistArchiveStream;
 use Alltube\Stream\YoutubeStream;
-use Alltube\Video;
-use Exception;
 use Slim\Http\Request;
 use Slim\Http\Response;
 use Slim\Http\Stream;
@@ -25,17 +31,18 @@ class DownloadController extends BaseController
     /**
      * Redirect to video file.
      *
-     * @param Request  $request  PSR-7 request
+     * @param Request $request PSR-7 request
      * @param Response $response PSR-7 response
      *
      * @return Response HTTP response
+     * @throws AlltubeLibraryException
      */
     public function download(Request $request, Response $response)
     {
         $url = $request->getQueryParam('url');
 
         if (isset($url)) {
-            $this->video = new Video($url, $this->getFormat($request), $this->getPassword($request));
+            $this->video = $this->downloader->getVideo($url, $this->getFormat($request), $this->getPassword($request));
 
             try {
                 if ($this->config->convert && $request->getQueryParam('audio')) {
@@ -49,14 +56,33 @@ class DownloadController extends BaseController
                 // Regular download.
                 return $this->getDownloadResponse($request, $response);
             } catch (PasswordException $e) {
-                return $response->withRedirect(
-                    $this->container->get('router')->pathFor('info') .
-                        '?' . http_build_query($request->getQueryParams())
-                );
-            } catch (Exception $e) {
-                $response->getBody()->write($e->getMessage());
+                $frontController = new FrontController($this->container);
 
-                return $response->withHeader('Content-Type', 'text/plain')->withStatus(500);
+                return $frontController->password($request, $response);
+            } catch (WrongPasswordException $e) {
+                return $this->displayError($request, $response, $this->localeManager->t('Wrong password'));
+            } catch (PlaylistConversionException $e) {
+                return $this->displayError(
+                    $request,
+                    $response,
+                    $this->localeManager->t('Conversion of playlists is not supported.')
+                );
+            } catch (InvalidProtocolConversionException $e) {
+                if (in_array($this->video->protocol, ['m3u8', 'm3u8_native'])) {
+                    return $this->displayError(
+                        $request,
+                        $response,
+                        $this->localeManager->t('Conversion of M3U8 files is not supported.')
+                    );
+                } elseif ($this->video->protocol == 'http_dash_segments') {
+                    return $this->displayError(
+                        $request,
+                        $response,
+                        $this->localeManager->t('Conversion of DASH segments is not supported.')
+                    );
+                } else {
+                    throw $e;
+                }
             }
         } else {
             return $response->withRedirect($this->container->get('router')->pathFor('index'));
@@ -70,8 +96,7 @@ class DownloadController extends BaseController
      * @param Response $response PSR-7 response
      *
      * @return Response HTTP response
-     * @throws PasswordException
-     * @throws Exception
+     * @throws AlltubeLibraryException
      */
     private function getConvertedAudioResponse(Request $request, Response $response)
     {
@@ -86,13 +111,7 @@ class DownloadController extends BaseController
         $response = $response->withHeader('Content-Type', 'audio/mpeg');
 
         if ($request->isGet() || $request->isPost()) {
-            try {
-                $process = $this->video->getAudioStream($from, $to);
-            } catch (Exception $e) {
-                // Fallback to default format.
-                $this->video = $this->video->withFormat($this->defaultFormat);
-                $process = $this->video->getAudioStream($from, $to);
-            }
+            $process = $this->downloader->getAudioStream($this->video, $this->config->audioBitrate, $from, $to);
             $response = $response->withBody(new Stream($process));
         }
 
@@ -106,36 +125,38 @@ class DownloadController extends BaseController
      * @param Response $response PSR-7 response
      *
      * @return Response HTTP response
+     * @throws AlltubeLibraryException
+     * @throws EmptyUrlException
      * @throws PasswordException
+     * @throws WrongPasswordException
      */
     private function getAudioResponse(Request $request, Response $response)
     {
-        try {
-            // First, we try to get a MP3 file directly.
-            if (!empty($request->getQueryParam('from')) || !empty($request->getQueryParam('to'))) {
-                throw new Exception('Force convert when we need to seek.');
-            }
-
-            if ($this->config->stream) {
-                $this->video = $this->video->withFormat('mp3');
-
-                return $this->getStream($request, $response);
-            } else {
-                $this->video = $this->video->withFormat('mp3[protocol=https]/mp3[protocol=http]');
-
-                $urls = $this->video->getUrl();
-
-                return $response->withRedirect($urls[0]);
-            }
-        } catch (PasswordException $e) {
-            $frontController = new FrontController($this->container);
-
-            return $frontController->password($request, $response);
-        } catch (Exception $e) {
-            // If MP3 is not available, we convert it.
-            $this->video = $this->video->withFormat('bestaudio/best');
+        if (!empty($request->getQueryParam('from')) || !empty($request->getQueryParam('to'))) {
+            // Force convert when we need to seek.
+            $this->video = $this->video->withFormat('bestaudio/' . $this->defaultFormat);
 
             return $this->getConvertedAudioResponse($request, $response);
+        } else {
+            try {
+                // First, we try to get a MP3 file directly.
+                if ($this->config->stream) {
+                    $this->video = $this->video->withFormat('mp3');
+
+                    return $this->getStream($request, $response);
+                } else {
+                    $this->video = $this->video->withFormat(Config::addHttpToFormat('mp3'));
+
+                    $urls = $this->video->getUrl();
+
+                    return $response->withRedirect($urls[0]);
+                }
+            } catch (YoutubedlException $e) {
+                // If MP3 is not available, we convert it.
+                $this->video = $this->video->withFormat('bestaudio/' . $this->defaultFormat);
+
+                return $this->getConvertedAudioResponse($request, $response);
+            }
         }
     }
 
@@ -146,17 +167,15 @@ class DownloadController extends BaseController
      *
      * @param Response $response PSR-7 response
      * @return Response HTTP response
-     * @throws EmptyUrlException
-     * @throws PasswordException
-     * @throws Exception
+     * @throws AlltubeLibraryException
      */
     private function getStream(Request $request, Response $response)
     {
         if (isset($this->video->entries)) {
             if ($this->config->convert && $request->getQueryParam('audio')) {
-                $stream = new ConvertedPlaylistArchiveStream($this->video);
+                $stream = new ConvertedPlaylistArchiveStream($this->downloader, $this->video);
             } else {
-                $stream = new PlaylistArchiveStream($this->video);
+                $stream = new PlaylistArchiveStream($this->downloader, $this->video);
             }
             $response = $response->withHeader('Content-Type', 'application/zip');
             $response = $response->withHeader(
@@ -167,10 +186,10 @@ class DownloadController extends BaseController
             return $response->withBody($stream);
         } elseif ($this->video->protocol == 'rtmp') {
             $response = $response->withHeader('Content-Type', 'video/' . $this->video->ext);
-            $body = new Stream($this->video->getRtmpStream());
+            $body = new Stream($this->downloader->getRtmpStream($this->video));
         } elseif ($this->video->protocol == 'm3u8' || $this->video->protocol == 'm3u8_native') {
             $response = $response->withHeader('Content-Type', 'video/' . $this->video->ext);
-            $body = new Stream($this->video->getM3uStream());
+            $body = new Stream($this->downloader->getM3uStream($this->video));
         } else {
             $headers = [];
             $range = $request->getHeader('Range');
@@ -178,7 +197,7 @@ class DownloadController extends BaseController
             if (!empty($range)) {
                 $headers['Range'] = $range;
             }
-            $stream = $this->video->getHttpResponse($headers);
+            $stream = $this->downloader->getHttpResponse($this->video, $headers);
 
             $response = $response->withHeader('Content-Type', $stream->getHeader('Content-Type'));
             $response = $response->withHeader('Content-Length', $stream->getHeader('Content-Length'));
@@ -190,7 +209,7 @@ class DownloadController extends BaseController
 
             if (isset($this->video->downloader_options->http_chunk_size)) {
                 // Workaround for Youtube throttling the download speed.
-                $body = new YoutubeStream($this->video);
+                $body = new YoutubeStream($this->downloader, $this->video);
             } else {
                 $body = $stream->getBody();
             }
@@ -201,7 +220,7 @@ class DownloadController extends BaseController
         $response = $response->withHeader(
             'Content-Disposition',
             'attachment; filename="' .
-                $this->video->getFilename() . '"'
+            $this->video->getFilename() . '"'
         );
 
         return $response;
@@ -210,19 +229,18 @@ class DownloadController extends BaseController
     /**
      * Get a remuxed stream piped through the server.
      *
-     * @param Response $response PSR-7 response
      * @param Request $request PSR-7 request
      *
+     * @param Response $response PSR-7 response
      * @return Response HTTP response
-     * @throws PasswordException
-     * @throws Exception
+     * @throws AlltubeLibraryException
      */
     private function getRemuxStream(Request $request, Response $response)
     {
         if (!$this->config->remux) {
-            throw new Exception($this->localeManager->t('You need to enable remux mode to merge two formats.'));
+            throw new RemuxException('You need to enable remux mode to merge two formats.');
         }
-        $stream = $this->video->getRemuxStream();
+        $stream = $this->downloader->getRemuxStream($this->video);
         $response = $response->withHeader('Content-Type', 'video/x-matroska');
         if ($request->isGet()) {
             $response = $response->withBody(new Stream($stream));
@@ -242,9 +260,7 @@ class DownloadController extends BaseController
      *
      * @param Response $response PSR-7 response
      * @return Response HTTP response
-     * @throws EmptyUrlException
-     * @throws PasswordException
-     * @throws Exception
+     * @throws AlltubeLibraryException
      */
     private function getDownloadResponse(Request $request, Response $response)
     {
@@ -263,7 +279,7 @@ class DownloadController extends BaseController
             return $this->getStream($request, $response);
         } else {
             if (empty($videoUrls[0])) {
-                throw new Exception($this->localeManager->t("Can't find URL of video."));
+                throw new EmptyUrlException("Can't find URL of video.");
             }
 
             return $response->withRedirect($videoUrls[0]);
@@ -277,8 +293,13 @@ class DownloadController extends BaseController
      * @param Response $response PSR-7 response
      *
      * @return Response HTTP response
+     * @throws AlltubeLibraryException
+     * @throws InvalidProtocolConversionException
      * @throws PasswordException
-     * @throws Exception
+     * @throws PlaylistConversionException
+     * @throws WrongPasswordException
+     * @throws YoutubedlException
+     * @throws PopenStreamException
      */
     private function getConvertedResponse(Request $request, Response $response)
     {
@@ -290,7 +311,8 @@ class DownloadController extends BaseController
         $response = $response->withHeader('Content-Type', 'video/' . $request->getQueryParam('customFormat'));
 
         if ($request->isGet() || $request->isPost()) {
-            $process = $this->video->getConvertedStream(
+            $process = $this->downloader->getConvertedStream(
+                $this->video,
                 $request->getQueryParam('customBitrate'),
                 $request->getQueryParam('customFormat')
             );
diff --git a/controllers/FrontController.php b/controllers/FrontController.php
index b0c4a65..2b6109a 100644
--- a/controllers/FrontController.php
+++ b/controllers/FrontController.php
@@ -6,12 +6,13 @@
 
 namespace Alltube\Controller;
 
-use Alltube\Exception\PasswordException;
+use Alltube\Library\Exception\PasswordException;
+use Alltube\Library\Exception\AlltubeLibraryException;
+use Alltube\Library\Exception\WrongPasswordException;
 use Alltube\Locale;
-use Alltube\Video;
+use Exception;
 use Symfony\Component\ErrorHandler\ErrorRenderer\HtmlErrorRenderer;
 use Throwable;
-use Exception;
 use Psr\Container\ContainerInterface;
 use Slim\Http\Request;
 use Slim\Http\Response;
@@ -94,7 +95,7 @@ class FrontController extends BaseController
      * @param Response $response PSR-7 response
      *
      * @return Response HTTP response
-     * @throws PasswordException
+     * @throws AlltubeLibraryException
      */
     public function extractors(Request $request, Response $response)
     {
@@ -103,7 +104,7 @@ class FrontController extends BaseController
             'extractors.tpl',
             [
                 'config' => $this->config,
-                'extractors' => Video::getExtractors(),
+                'extractors' => $this->downloader->getExtractors(),
                 'class' => 'extractors',
                 'title' => $this->localeManager->t('Supported websites'),
                 'description' => $this->localeManager->t('List of all supported websites from which Alltube Download ' .
@@ -141,7 +142,7 @@ class FrontController extends BaseController
             ]
         );
 
-        return $response;
+        return $response->withStatus(403);
     }
 
     /**
@@ -151,6 +152,7 @@ class FrontController extends BaseController
      * @param Response $response PSR-7 response
      *
      * @return Response HTTP response
+     * @throws AlltubeLibraryException
      */
     private function getInfoResponse(Request $request, Response $response)
     {
@@ -158,6 +160,8 @@ class FrontController extends BaseController
             $this->video->getJson();
         } catch (PasswordException $e) {
             return $this->password($request, $response);
+        } catch (WrongPasswordException $e) {
+            return $this->displayError($request, $response, $this->localeManager->t('Wrong password'));
         }
 
         if (isset($this->video->entries)) {
@@ -205,13 +209,14 @@ class FrontController extends BaseController
      * @param Response $response PSR-7 response
      *
      * @return Response HTTP response
+     * @throws AlltubeLibraryException
      */
     public function info(Request $request, Response $response)
     {
         $url = $request->getQueryParam('url') ?: $request->getQueryParam('v');
 
         if (isset($url) && !empty($url)) {
-            $this->video = new Video($url, $this->getFormat($request), $this->getPassword($request));
+            $this->video = $this->downloader->getVideo($url, $this->getFormat($request), $this->getPassword($request));
 
             if ($this->config->convert && $request->getQueryParam('audio')) {
                 // We skip the info page and get directly to the download.
@@ -227,6 +232,33 @@ class FrontController extends BaseController
         }
     }
 
+    /**
+     * Display an user-friendly error.
+     *
+     * @param Request $request PSR-7 request
+     * @param Response $response PSR-7 response
+     * @param string $message Error message
+     *
+     * @return Response HTTP response
+     */
+    protected function displayError(Request $request, Response $response, $message)
+    {
+        $this->view->render(
+            $response,
+            'error.tpl',
+            [
+                'config' => $this->config,
+                'error' => $message,
+                'class' => 'video',
+                'title' => $this->localeManager->t('Error'),
+                'canonical' => $this->getCanonicalUrl($request),
+                'locale' => $this->localeManager->getLocale(),
+            ]
+        );
+
+        return $response->withStatus(500);
+    }
+
     /**
      * Display an error page.
      *
@@ -241,7 +273,11 @@ class FrontController extends BaseController
         if ($this->config->debug) {
             $renderer = new HtmlErrorRenderer(true);
             $exception = $renderer->render($error);
+
             $response->getBody()->write($exception->getAsString());
+            foreach ($exception->getHeaders() as $header => $value) {
+                $response = $response->withHeader($header, $value);
+            }
 
             return $response->withStatus($exception->getStatusCode());
         } else {
@@ -251,20 +287,7 @@ class FrontController extends BaseController
                 $message = '';
             }
 
-            $this->view->render(
-                $response,
-                'error.tpl',
-                [
-                    'config' => $this->config,
-                    'error' => $message,
-                    'class' => 'video',
-                    'title' => $this->localeManager->t('Error'),
-                    'canonical' => $this->getCanonicalUrl($request),
-                    'locale' => $this->localeManager->getLocale(),
-                ]
-            );
-
-            return $response->withStatus(500);
+            return $this->displayError($request, $response, $message);
         }
     }
 
diff --git a/controllers/JsonController.php b/controllers/JsonController.php
index bfc9d75..9e37cc2 100644
--- a/controllers/JsonController.php
+++ b/controllers/JsonController.php
@@ -6,8 +6,7 @@
 
 namespace Alltube\Controller;
 
-use Alltube\Video;
-use Exception;
+use Alltube\Library\Exception\AlltubeLibraryException;
 use Slim\Http\Request;
 use Slim\Http\Response;
 
@@ -19,24 +18,24 @@ class JsonController extends BaseController
     /**
      * Return the JSON object generated by youtube-dl.
      *
-     * @param Request  $request  PSR-7 request
+     * @param Request $request PSR-7 request
      * @param Response $response PSR-7 response
      *
      * @return Response HTTP response
+     * @throws AlltubeLibraryException
      */
     public function json(Request $request, Response $response)
     {
         $url = $request->getQueryParam('url');
 
         if (isset($url)) {
-            try {
-                $this->video = new Video($url, $this->getFormat($request), $this->getPassword($request));
+            $this->video = $this->downloader->getVideo(
+                $url,
+                $this->getFormat($request),
+                $this->getPassword($request)
+            );
 
-                return $response->withJson($this->video->getJson());
-            } catch (Exception $e) {
-                return $response->withJson(['error' => $e->getMessage()])
-                    ->withStatus(500);
-            }
+            return $response->withJson($this->video->getJson());
         } else {
             return $response->withJson(['error' => 'You need to provide the url parameter'])
                 ->withStatus(400);
diff --git a/i18n/template.pot b/i18n/template.pot
index a7d5402..ce9d383 100644
--- a/i18n/template.pot
+++ b/i18n/template.pot
@@ -1,27 +1,6 @@
 msgid ""
 msgstr "Content-Type: text/plain; charset=UTF-8\n"
 
-#: templates/playlist.tpl:13
-msgid "Videos extracted from @title:"
-msgstr ""
-
-#: templates/playlist.tpl:38 templates/password.tpl:11 templates/index.tpl:19
-#: templates/info.tpl:98
-msgid "Download"
-msgstr ""
-
-#: templates/playlist.tpl:39
-msgid "More options"
-msgstr ""
-
-#: templates/inc/header.tpl:4
-msgid "Switch language"
-msgstr ""
-
-#: templates/inc/header.tpl:8
-msgid "Set language"
-msgstr ""
-
 #: templates/inc/footer.tpl:8
 msgid "Code by @dev"
 msgstr ""
@@ -46,6 +25,87 @@ msgstr ""
 msgid "Donate"
 msgstr ""
 
+#: templates/inc/header.tpl:4
+msgid "Switch language"
+msgstr ""
+
+#: templates/inc/header.tpl:8
+msgid "Set language"
+msgstr ""
+
+#: templates/info.tpl:11
+msgid "You are going to download @title."
+msgstr ""
+
+#: templates/info.tpl:29
+msgid "Available formats:"
+msgstr ""
+
+#: templates/info.tpl:31
+msgid "Generic formats"
+msgstr ""
+
+#: templates/info.tpl:36
+msgid "Detailed formats"
+msgstr ""
+
+#: templates/info.tpl:80
+msgid "Stream the video through the server"
+msgstr ""
+
+#: templates/info.tpl:86
+msgid "Convert into a custom format:"
+msgstr ""
+
+#: templates/info.tpl:87
+msgid "Custom format"
+msgstr ""
+
+#: templates/info.tpl:87
+msgid "Format to convert to"
+msgstr ""
+
+#: templates/info.tpl:92
+msgid "with"
+msgstr ""
+
+#: templates/info.tpl:93
+msgid "Bit rate"
+msgstr ""
+
+#: templates/info.tpl:94
+msgid "Custom bitrate"
+msgstr ""
+
+#: templates/info.tpl:97
+msgid "kbit/s audio"
+msgstr ""
+
+#: templates/info.tpl:101 templates/playlist.tpl:38 templates/password.tpl:11
+#: templates/index.tpl:19
+msgid "Download"
+msgstr ""
+
+#: templates/playlist.tpl:12
+msgid "Videos extracted from @title:"
+msgstr ""
+
+#: templates/playlist.tpl:39
+msgid "More options"
+msgstr ""
+
+#: templates/extractors.tpl:4 controllers/FrontController.php:109
+msgid "Supported websites"
+msgstr ""
+
+#: templates/error.tpl:5
+msgid "An error occurred"
+msgstr ""
+
+#: templates/error.tpl:6
+msgid "Please check the URL of your video."
+msgstr ""
+
 #: templates/password.tpl:5
 msgid "This video is protected"
 msgstr ""
@@ -70,144 +130,51 @@ msgstr ""
 msgid "From"
 msgstr ""
 
-#: templates/index.tpl:29
+#: templates/index.tpl:31
 msgid "to"
 msgstr ""
 
-#: templates/index.tpl:36
+#: templates/index.tpl:39
 msgid "See all supported websites"
 msgstr ""
 
-#: templates/index.tpl:38
+#: templates/index.tpl:41
 msgid "Drag this to your bookmarks bar:"
 msgstr ""
 
-#: templates/index.tpl:39
+#: templates/index.tpl:43
 msgid "Bookmarklet"
 msgstr ""
 
-#: templates/info.tpl:13
-msgid "You are going to download @title."
-msgstr ""
-
-#: templates/info.tpl:31
-msgid "Available formats:"
-msgstr ""
-
-#: templates/info.tpl:33
-msgid "Generic formats"
-msgstr ""
-
-#: templates/info.tpl:38
-msgid "Detailed formats"
-msgstr ""
-
-#: templates/info.tpl:80
-msgid "Stream the video through the server"
-msgstr ""
-
-#: templates/info.tpl:85
-msgid "Convert into a custom format:"
-msgstr ""
-
-#: templates/info.tpl:86
-msgid "Custom format"
-msgstr ""
-
-#: templates/info.tpl:86
-msgid "Format to convert to"
-msgstr ""
-
-#: templates/info.tpl:91
-msgid "with"
-msgstr ""
-
-#: templates/info.tpl:92
-msgid "Bit rate"
-msgstr ""
-
-#: templates/info.tpl:93
-msgid "Custom bitrate"
-msgstr ""
-
-#: templates/info.tpl:95
-msgid "kbit/s audio"
-msgstr ""
-
-#: templates/error.tpl:5
-msgid "An error occurred"
-msgstr ""
-
-#: templates/error.tpl:6
-msgid "Please check the URL of your video."
-msgstr ""
-
-#: templates/extractors.tpl:4 controllers/FrontController.php:109
-msgid "Supported websites"
-msgstr ""
-
-#: classes/Config.php:158
+#: classes/Config.php:156
 msgid "Best"
 msgstr ""
 
-#: classes/Config.php:159
+#: classes/Config.php:157
 msgid "Remux best video with best audio"
 msgstr ""
 
-#: classes/Config.php:160
+#: classes/Config.php:158
 msgid "Worst"
 msgstr ""
 
-#: classes/Video.php:159
+#: controllers/DownloadController.php:63 controllers/FrontController.php:164
 msgid "Wrong password"
 msgstr ""
 
-#: classes/Video.php:250
-msgid "youtube-dl returned an empty URL."
-msgstr ""
-
-#: classes/Video.php:361 classes/Video.php:465
-msgid "Can't find avconv or ffmpeg at @path."
-msgstr ""
-
-#: classes/Video.php:377
-msgid "Invalid start time: @from."
-msgstr ""
-
-#: classes/Video.php:384
-msgid "Invalid end time: @to."
-msgstr ""
-
-#: classes/Video.php:430
+#: controllers/DownloadController.php:68
 msgid "Conversion of playlists is not supported."
 msgstr ""
 
-#: classes/Video.php:435 classes/Video.php:578
+#: controllers/DownloadController.php:75
 msgid "Conversion of M3U8 files is not supported."
 msgstr ""
 
-#: classes/Video.php:437
+#: controllers/DownloadController.php:81
 msgid "Conversion of DASH segments is not supported."
 msgstr ""
 
-#: classes/Video.php:446 classes/Video.php:488 classes/Video.php:525
-#: classes/Video.php:558 classes/Video.php:586
-msgid "Could not open popen stream."
-msgstr ""
-
-#: classes/Video.php:506
-msgid "This video does not have two URLs."
-msgstr ""
-
-#: controllers/DownloadController.php:215
-msgid "You need to enable remux mode to merge two formats."
-msgstr ""
-
-#: controllers/DownloadController.php:255
-msgid "Can't find URL of video."
-msgstr ""
-
-#: controllers/FrontController.php:64
+#: controllers/FrontController.php:63
 msgid ""
 "Easily download videos from Youtube, Dailymotion, Vimeo and other websites."
 msgstr ""
@@ -227,18 +194,18 @@ msgid ""
 "You need a password in order to download this video with Alltube Download"
 msgstr ""
 
-#: controllers/FrontController.php:169
+#: controllers/FrontController.php:172
 msgid "Video download"
 msgstr ""
 
-#: controllers/FrontController.php:171
+#: controllers/FrontController.php:174
 msgid "Download video from @extractor"
 msgstr ""
 
-#: controllers/FrontController.php:177
+#: controllers/FrontController.php:180
 msgid "Download @title from @extractor"
 msgstr ""
 
-#: controllers/FrontController.php:253 controllers/FrontController.php:284
+#: controllers/FrontController.php:253
 msgid "Error"
 msgstr ""
diff --git a/templates/error.tpl b/templates/error.tpl
index 49663ec..98605b8 100644
--- a/templates/error.tpl
+++ b/templates/error.tpl
@@ -4,6 +4,6 @@
         {include file="inc/logo.tpl"}
         <h2>{t}An error occurred{/t}</h2>
         {t}Please check the URL of your video.{/t}
-        <p><i>{$error|escape}</i></p>
+        <p><i>{$error|escape|nl2br}</i></p>
     </main>
     {include file='inc/footer.tpl'}
diff --git a/tests/BaseTest.php b/tests/BaseTest.php
index d717b79..aac832b 100644
--- a/tests/BaseTest.php
+++ b/tests/BaseTest.php
@@ -7,7 +7,7 @@
 namespace Alltube\Test;
 
 use Alltube\Config;
-use Exception;
+use Alltube\Exception\ConfigException;
 use PHPUnit\Framework\TestCase;
 
 /**
@@ -33,7 +33,7 @@ abstract class BaseTest extends TestCase
 
     /**
      * Prepare tests.
-     * @throws Exception
+     * @throws ConfigException
      */
     protected function setUp(): void
     {
diff --git a/tests/ConfigTest.php b/tests/ConfigTest.php
index 09374cf..cbaf21d 100644
--- a/tests/ConfigTest.php
+++ b/tests/ConfigTest.php
@@ -7,7 +7,7 @@
 namespace Alltube\Test;
 
 use Alltube\Config;
-use Exception;
+use Alltube\Exception\ConfigException;
 
 /**
  * Unit tests for the Config class.
@@ -23,7 +23,7 @@ class ConfigTest extends BaseTest
 
     /**
      * Prepare tests.
-     * @throws Exception
+     * @throws ConfigException
      */
     protected function setUp(): void
     {
@@ -82,7 +82,7 @@ class ConfigTest extends BaseTest
      * Test the setFile function.
      *
      * @return void
-     * @throws Exception
+     * @throws ConfigException
      */
     public function testSetFile()
     {
@@ -97,7 +97,7 @@ class ConfigTest extends BaseTest
      */
     public function testSetFileWithMissingFile()
     {
-        $this->expectException(Exception::class);
+        $this->expectException(ConfigException::class);
         Config::setFile('foo');
     }
 
@@ -105,7 +105,7 @@ class ConfigTest extends BaseTest
      * Test the setOptions function.
      *
      * @return void
-     * @throws Exception
+     * @throws ConfigException
      */
     public function testSetOptions()
     {
@@ -118,7 +118,7 @@ class ConfigTest extends BaseTest
      * Test the setOptions function.
      *
      * @return void
-     * @throws Exception
+     * @throws ConfigException
      */
     public function testSetOptionsWithoutUpdate()
     {
@@ -134,7 +134,7 @@ class ConfigTest extends BaseTest
      */
     public function testSetOptionsWithBadYoutubedl()
     {
-        $this->expectException(Exception::class);
+        $this->expectException(ConfigException::class);
         Config::setOptions(['youtubedl' => 'foo']);
     }
 
@@ -145,7 +145,7 @@ class ConfigTest extends BaseTest
      */
     public function testSetOptionsWithBadPython()
     {
-        $this->expectException(Exception::class);
+        $this->expectException(ConfigException::class);
         Config::setOptions(['python' => 'foo']);
     }
 
@@ -153,7 +153,7 @@ class ConfigTest extends BaseTest
      * Test the getInstance function with the CONVERT and PYTHON environment variables.
      *
      * @return void
-     * @throws Exception
+     * @throws ConfigException
      */
     public function testGetInstanceWithEnv()
     {
diff --git a/tests/ControllerTest.php b/tests/ControllerTest.php
index bd9f737..abb3756 100644
--- a/tests/ControllerTest.php
+++ b/tests/ControllerTest.php
@@ -9,13 +9,14 @@ namespace Alltube\Test;
 use Alltube\Controller\BaseController;
 use Alltube\Controller\DownloadController;
 use Alltube\Controller\FrontController;
+use Alltube\Exception\ConfigException;
 use Alltube\LocaleManager;
 use Alltube\ViewFactory;
-use Exception;
 use Slim\Container;
 use Slim\Http\Environment;
 use Slim\Http\Request;
 use Slim\Http\Response;
+use SmartyException;
 
 /**
  * Abstract class used by the controller tests.
@@ -51,7 +52,7 @@ abstract class ControllerTest extends BaseTest
 
     /**
      * Prepare tests.
-     * @throws Exception
+     * @throws ConfigException|SmartyException
      */
     protected function setUp(): void
     {
diff --git a/tests/ConvertedPlaylistArchiveStreamTest.php b/tests/ConvertedPlaylistArchiveStreamTest.php
index e8cb002..0ed373f 100644
--- a/tests/ConvertedPlaylistArchiveStreamTest.php
+++ b/tests/ConvertedPlaylistArchiveStreamTest.php
@@ -6,9 +6,9 @@
 
 namespace Alltube\Test;
 
+use Alltube\Config;
+use Alltube\Exception\ConfigException;
 use Alltube\Stream\ConvertedPlaylistArchiveStream;
-use Alltube\Video;
-use Exception;
 
 /**
  * Unit tests for the ConvertedPlaylistArchiveStream class.
@@ -18,14 +18,16 @@ class ConvertedPlaylistArchiveStreamTest extends StreamTest
 {
     /**
      * Prepare tests.
-     * @throws Exception
+     * @throws ConfigException
      */
     protected function setUp(): void
     {
         parent::setUp();
 
-        $video = new Video('https://www.youtube.com/playlist?list=PL1j4Ff8cAqPu5iowaeUAY8lRgkfT4RybJ');
+        $config = Config::getInstance();
+        $downloader = $config->getDownloader();
+        $video = $downloader->getVideo('https://www.youtube.com/playlist?list=PL1j4Ff8cAqPu5iowaeUAY8lRgkfT4RybJ');
 
-        $this->stream = new ConvertedPlaylistArchiveStream($video);
+        $this->stream = new ConvertedPlaylistArchiveStream($downloader, $video);
     }
 }
diff --git a/tests/DownloadControllerTest.php b/tests/DownloadControllerTest.php
index 761ba21..019122b 100644
--- a/tests/DownloadControllerTest.php
+++ b/tests/DownloadControllerTest.php
@@ -8,7 +8,11 @@ namespace Alltube\Test;
 
 use Alltube\Config;
 use Alltube\Controller\DownloadController;
-use Exception;
+use Alltube\Exception\ConfigException;
+use Alltube\Library\Exception\EmptyUrlException;
+use Alltube\Library\Exception\RemuxException;
+use Alltube\Library\Exception\YoutubedlException;
+use SmartyException;
 
 /**
  * Unit tests for the FrontController class.
@@ -18,7 +22,7 @@ class DownloadControllerTest extends ControllerTest
 {
     /**
      * Prepare tests.
-     * @throws Exception
+     * @throws ConfigException|SmartyException
      */
     protected function setUp(): void
     {
@@ -64,7 +68,7 @@ class DownloadControllerTest extends ControllerTest
      * Test the download() function with streams enabled.
      *
      * @return void
-     * @throws Exception
+     * @throws ConfigException
      */
     public function testDownloadWithStream()
     {
@@ -80,7 +84,7 @@ class DownloadControllerTest extends ControllerTest
      * Test the download() function with an M3U stream.
      *
      * @return void
-     * @throws Exception
+     * @throws ConfigException
      */
     public function testDownloadWithM3uStream()
     {
@@ -100,7 +104,7 @@ class DownloadControllerTest extends ControllerTest
      * Test the download() function with an RTMP stream.
      *
      * @return void
-     * @throws Exception
+     * @throws ConfigException
      */
     public function testDownloadWithRtmpStream()
     {
@@ -118,7 +122,7 @@ class DownloadControllerTest extends ControllerTest
      * Test the download() function with a remuxed video.
      *
      * @return void
-     * @throws Exception
+     * @throws ConfigException
      */
     public function testDownloadWithRemux()
     {
@@ -140,7 +144,8 @@ class DownloadControllerTest extends ControllerTest
      */
     public function testDownloadWithRemuxDisabled()
     {
-        $this->assertRequestIsServerError(
+        $this->expectException(RemuxException::class);
+        $this->getRequestResult(
             'download',
             [
                 'url'    => 'https://www.youtube.com/watch?v=M7IpKCZ47pU',
@@ -166,7 +171,8 @@ class DownloadControllerTest extends ControllerTest
      */
     public function testDownloadWithError()
     {
-        $this->assertRequestIsServerError('download', ['url' => 'http://example.com/foo']);
+        $this->expectException(YoutubedlException::class);
+        $this->getRequestResult('download', ['url' => 'http://example.com/foo']);
     }
 
     /**
@@ -177,7 +183,8 @@ class DownloadControllerTest extends ControllerTest
      */
     public function testDownloadWithEmptyUrl()
     {
-        $this->assertRequestIsServerError(
+        $this->expectException(EmptyUrlException::class);
+        $this->getRequestResult(
             'download',
             ['url' => 'https://www.youtube.com/playlist?list=PLgdySZU6KUXL_8Jq5aUkyNV7wCa-4wZsC']
         );
@@ -188,7 +195,7 @@ class DownloadControllerTest extends ControllerTest
      *
      * @return void
      * @requires OS Linux
-     * @throws Exception
+     * @throws ConfigException
      */
     public function testDownloadWithPlaylist()
     {
@@ -204,7 +211,7 @@ class DownloadControllerTest extends ControllerTest
      * Test the download() function with an advanced conversion.
      *
      * @return void
-     * @throws Exception
+     * @throws ConfigException
      */
     public function testDownloadWithAdvancedConversion()
     {
diff --git a/tests/FrontControllerTest.php b/tests/FrontControllerTest.php
index 92e4824..0e2ffe0 100644
--- a/tests/FrontControllerTest.php
+++ b/tests/FrontControllerTest.php
@@ -8,9 +8,12 @@ namespace Alltube\Test;
 
 use Alltube\Config;
 use Alltube\Controller\FrontController;
+use Alltube\Exception\ConfigException;
+use Alltube\Library\Exception\AlltubeLibraryException;
 use Exception;
 use Slim\Http\Environment;
 use Slim\Http\Request;
+use SmartyException;
 
 /**
  * Unit tests for the FrontController class.
@@ -25,7 +28,7 @@ class FrontControllerTest extends ControllerTest
 
     /**
      * Prepare tests.
-     * @throws Exception
+     * @throws ConfigException|SmartyException
      */
     protected function setUp(): void
     {
@@ -48,7 +51,7 @@ class FrontControllerTest extends ControllerTest
      * Test the constructor with streams enabled.
      *
      * @return void
-     * @throws Exception
+     * @throws ConfigException
      */
     public function testConstructorWithStream()
     {
@@ -99,7 +102,7 @@ class FrontControllerTest extends ControllerTest
      */
     public function testPassword()
     {
-        $this->assertRequestIsOk('password');
+        $this->assertRequestIsClientError('password');
     }
 
     /**
@@ -128,7 +131,7 @@ class FrontControllerTest extends ControllerTest
      *
      * @return void
      * @requires download
-     * @throws Exception
+     * @throws ConfigException
      */
     public function testInfoWithAudio()
     {
@@ -145,7 +148,7 @@ class FrontControllerTest extends ControllerTest
      *
      * @return void
      * @requires download
-     * @throws Exception
+     * @throws ConfigException
      */
     public function testInfoWithVimeoAudio()
     {
@@ -160,7 +163,7 @@ class FrontControllerTest extends ControllerTest
      *
      * @return void
      * @requires download
-     * @throws Exception
+     * @throws ConfigException
      */
     public function testInfoWithUnconvertedAudio()
     {
@@ -180,6 +183,7 @@ class FrontControllerTest extends ControllerTest
      *
      * @return void
      * @requires download
+     * @throws AlltubeLibraryException
      */
     public function testInfoWithPassword()
     {
@@ -199,8 +203,8 @@ class FrontControllerTest extends ControllerTest
      */
     public function testInfoWithMissingPassword()
     {
-        $this->assertRequestIsOk('info', ['url' => 'http://vimeo.com/68375962']);
-        $this->assertRequestIsOk('info', ['url' => 'http://vimeo.com/68375962', 'audio' => true]);
+        $this->assertRequestIsClientError('info', ['url' => 'http://vimeo.com/68375962']);
+        $this->assertRequestIsClientError('info', ['url' => 'http://vimeo.com/68375962', 'audio' => true]);
     }
 
     /**
@@ -208,7 +212,7 @@ class FrontControllerTest extends ControllerTest
      *
      * @return void
      * @requires download
-     * @throws Exception
+     * @throws ConfigException
      */
     public function testInfoWithStream()
     {
diff --git a/tests/JsonControllerTest.php b/tests/JsonControllerTest.php
index d2d6c3e..438b482 100644
--- a/tests/JsonControllerTest.php
+++ b/tests/JsonControllerTest.php
@@ -7,7 +7,9 @@
 namespace Alltube\Test;
 
 use Alltube\Controller\JsonController;
-use Exception;
+use Alltube\Exception\ConfigException;
+use Alltube\Library\Exception\YoutubedlException;
+use SmartyException;
 
 /**
  * Unit tests for the FrontController class.
@@ -16,7 +18,7 @@ class JsonControllerTest extends ControllerTest
 {
     /**
      * Prepare tests.
-     * @throws Exception
+     * @throws ConfigException|SmartyException
      */
     protected function setUp(): void
     {
@@ -44,7 +46,8 @@ class JsonControllerTest extends ControllerTest
      */
     public function testJsonWithError()
     {
-        $this->assertRequestIsServerError('json', ['url' => 'http://example.com/foo']);
+        $this->expectException(YoutubedlException::class);
+        $this->getRequestResult('json', ['url' => 'http://example.com/foo']);
     }
 
     /**
diff --git a/tests/PlaylistArchiveStreamTest.php b/tests/PlaylistArchiveStreamTest.php
index f02a6ea..29b103f 100644
--- a/tests/PlaylistArchiveStreamTest.php
+++ b/tests/PlaylistArchiveStreamTest.php
@@ -6,9 +6,9 @@
 
 namespace Alltube\Test;
 
+use Alltube\Config;
+use Alltube\Exception\ConfigException;
 use Alltube\Stream\PlaylistArchiveStream;
-use Alltube\Video;
-use Exception;
 
 /**
  * Unit tests for the PlaylistArchiveStream class.
@@ -18,14 +18,16 @@ class PlaylistArchiveStreamTest extends StreamTest
 {
     /**
      * Prepare tests.
-     * @throws Exception
+     * @throws ConfigException
      */
     protected function setUp(): void
     {
         parent::setUp();
 
-        $video = new Video('https://www.youtube.com/playlist?list=PL1j4Ff8cAqPu5iowaeUAY8lRgkfT4RybJ');
+        $config = Config::getInstance();
+        $downloader = $config->getDownloader();
+        $video = $downloader->getVideo('https://www.youtube.com/playlist?list=PL1j4Ff8cAqPu5iowaeUAY8lRgkfT4RybJ');
 
-        $this->stream = new PlaylistArchiveStream($video);
+        $this->stream = new PlaylistArchiveStream($downloader, $video);
     }
 }
diff --git a/tests/VideoStubsTest.php b/tests/VideoStubsTest.php
index 51f758d..789e839 100644
--- a/tests/VideoStubsTest.php
+++ b/tests/VideoStubsTest.php
@@ -6,36 +6,51 @@
 
 namespace Alltube\Test;
 
-use Alltube\Video;
+use Alltube\Config;
+use Alltube\Exception\ConfigException;
+use Alltube\Library\Downloader;
+use Alltube\Library\Exception\AlltubeLibraryException;
+use Alltube\Library\Exception\PopenStreamException;
+use Alltube\Library\Video;
 use Mockery;
 use phpmock\mockery\PHPMockery;
-use Exception;
 
 /**
  * Unit tests for the Video class.
  * They are in a separate file so they can safely replace PHP functions with stubs.
+ *
+ * @requires download
  */
 class VideoStubsTest extends BaseTest
 {
     /**
-     * Video URL used in many tests.
+     * Video used in many tests.
      *
      * @var Video
      */
     private $video;
 
+    /**
+     * Downloader instance used in tests.
+     *
+     * @var Downloader
+     */
+    private $downloader;
+
     /**
      * Initialize properties used by test.
-     * @throws Exception
+     * @throws ConfigException
      */
     protected function setUp(): void
     {
         parent::setUp();
 
-        PHPMockery::mock('Alltube', 'popen');
-        PHPMockery::mock('Alltube', 'fopen');
+        PHPMockery::mock('Alltube\Library', 'popen');
+        PHPMockery::mock('Alltube\Library', 'fopen');
 
-        $this->video = new Video('https://www.youtube.com/watch?v=XJC9_JkzugE');
+        $config = Config::getInstance();
+        $this->downloader = $config->getDownloader();
+        $this->video = $this->downloader->getVideo('https://www.youtube.com/watch?v=XJC9_JkzugE');
     }
 
     /**
@@ -52,55 +67,60 @@ class VideoStubsTest extends BaseTest
      * Test getAudioStream function with a buggy popen.
      *
      * @return void
+     * @throws AlltubeLibraryException
      */
     public function testGetAudioStreamWithPopenError()
     {
-        $this->expectException(Exception::class);
-        $this->video->getAudioStream();
+        $this->expectException(PopenStreamException::class);
+        $this->downloader->getAudioStream($this->video);
     }
 
     /**
      * Test getM3uStream function with a buggy popen.
      *
      * @return void
+     * @throws AlltubeLibraryException
      */
     public function testGetM3uStreamWithPopenError()
     {
-        $this->expectException(Exception::class);
-        $this->video->getM3uStream();
+        $this->expectException(PopenStreamException::class);
+        $this->downloader->getM3uStream($this->video);
     }
 
     /**
      * Test getRtmpStream function with a buggy popen.
      *
      * @return void
+     * @throws AlltubeLibraryException
      */
     public function testGetRtmpStreamWithPopenError()
     {
-        $this->expectException(Exception::class);
-        $this->video->getRtmpStream();
+        $this->expectException(PopenStreamException::class);
+        $this->downloader->getRtmpStream($this->video);
     }
 
     /**
      * Test getRemuxStream function with a buggy popen.
      *
      * @return void
+     * @throws AlltubeLibraryException
      */
     public function testGetRemuxStreamWithPopenError()
     {
-        $this->expectException(Exception::class);
+        $this->expectException(PopenStreamException::class);
         $video = $this->video->withFormat('bestvideo+bestaudio');
-        $video->getRemuxStream();
+        $this->downloader->getRemuxStream($video);
     }
 
     /**
      * Test getConvertedStream function with a buggy popen.
      *
      * @return void
+     * @throws AlltubeLibraryException
      */
     public function testGetConvertedStreamWithPopenError()
     {
-        $this->expectException(Exception::class);
-        $this->video->getConvertedStream(32, 'flv');
+        $this->expectException(PopenStreamException::class);
+        $this->downloader->getConvertedStream($this->video, 32, 'flv');
     }
 }
diff --git a/tests/VideoTest.php b/tests/VideoTest.php
index e6d4552..1b85038 100644
--- a/tests/VideoTest.php
+++ b/tests/VideoTest.php
@@ -7,26 +7,61 @@
 namespace Alltube\Test;
 
 use Alltube\Config;
-use Alltube\Exception\EmptyUrlException;
-use Alltube\Exception\PasswordException;
-use Alltube\Video;
-use Exception;
+use Alltube\Exception\ConfigException;
+use Alltube\Library\Downloader;
+use Alltube\Library\Exception\AlltubeLibraryException;
+use Alltube\Library\Exception\AvconvException;
+use Alltube\Library\Exception\InvalidProtocolConversionException;
+use Alltube\Library\Exception\PasswordException;
+use Alltube\Library\Exception\PlaylistConversionException;
+use Alltube\Library\Exception\RemuxException;
+use Alltube\Library\Exception\WrongPasswordException;
+use Alltube\Library\Exception\YoutubedlException;
+use Alltube\Library\Video;
 
 /**
  * Unit tests for the Video class.
  * @requires download
+ * @todo Split Downloader and Video tests.
  */
 class VideoTest extends BaseTest
 {
+    /**
+     * Downloader instance used in tests.
+     *
+     * @var Downloader
+     */
+    private $downloader;
+
+    /**
+     * Video format used in tests.
+     *
+     * @var string
+     */
+    private $format;
+
+    /**
+     * Prepare tests.
+     * @throws ConfigException
+     */
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $config = Config::getInstance();
+        $this->downloader = $config->getDownloader();
+        $this->format = 'best';
+    }
+
     /**
      * Test getExtractors function.
      *
      * @return void
-     * @throws PasswordException
+     * @throws AlltubeLibraryException
      */
     public function testGetExtractors()
     {
-        $this->assertContains('youtube', Video::getExtractors());
+        $this->assertContains('youtube', $this->downloader->getExtractors());
     }
 
     /**
@@ -39,8 +74,7 @@ class VideoTest extends BaseTest
      * @param string $domain Domain
      *
      * @return void
-     * @throws PasswordException
-     * @throws EmptyUrlException
+     * @throws AlltubeLibraryException
      * @dataProvider urlProvider
      * @dataProvider m3uUrlProvider
      * @dataProvider remuxUrlProvider
@@ -52,7 +86,7 @@ class VideoTest extends BaseTest
         /* @scrutinizer ignore-unused */ $extension,
         $domain
     ) {
-        $video = new Video($url, $format);
+        $video = new Video($this->downloader, $url, $format);
         foreach ($video->getUrl() as $videoURL) {
             $this->assertStringContainsString($domain, $videoURL);
         }
@@ -62,12 +96,11 @@ class VideoTest extends BaseTest
      * Test getUrl function with a protected video.
      *
      * @return void
-     * @throws EmptyUrlException
-     * @throws PasswordException
+     * @throws AlltubeLibraryException
      */
     public function testgetUrlWithPassword()
     {
-        $video = new Video('http://vimeo.com/68375962', 'best', 'youtube-dl');
+        $video = new Video($this->downloader, 'http://vimeo.com/68375962', 'best', 'youtube-dl');
         foreach ($video->getUrl() as $videoURL) {
             $this->assertStringContainsString('vimeocdn.com', $videoURL);
         }
@@ -77,13 +110,12 @@ class VideoTest extends BaseTest
      * Test getUrl function with a protected video and no password.
      *
      * @return void
-     * @throws EmptyUrlException
-     * @throws PasswordException
+     * @throws AlltubeLibraryException
      */
     public function testgetUrlWithMissingPassword()
     {
-        $this->expectException(Exception::class);
-        $video = new Video('http://vimeo.com/68375962');
+        $this->expectException(PasswordException::class);
+        $video = new Video($this->downloader, 'http://vimeo.com/68375962', $this->format);
         $video->getUrl();
     }
 
@@ -91,13 +123,12 @@ class VideoTest extends BaseTest
      * Test getUrl function with a protected video and a wrong password.
      *
      * @return void
-     * @throws EmptyUrlException
-     * @throws PasswordException
+     * @throws AlltubeLibraryException
      */
     public function testgetUrlWithWrongPassword()
     {
-        $this->expectException(Exception::class);
-        $video = new Video('http://vimeo.com/68375962', 'best', 'foo');
+        $this->expectException(WrongPasswordException::class);
+        $video = new Video($this->downloader, 'http://vimeo.com/68375962', 'best', 'foo');
         $video->getUrl();
     }
 
@@ -107,14 +138,13 @@ class VideoTest extends BaseTest
      * @param string $url URL
      *
      * @return void
-     * @throws EmptyUrlException
-     * @throws PasswordException
-     * @dataProvider      ErrorUrlProvider
+     * @throws AlltubeLibraryException
+     * @dataProvider ErrorUrlProvider
      */
     public function testgetUrlError($url)
     {
-        $this->expectException(Exception::class);
-        $video = new Video($url);
+        $this->expectException(YoutubedlException::class);
+        $video = new Video($this->downloader, $url, $this->format);
         $video->getUrl();
     }
 
@@ -224,13 +254,13 @@ class VideoTest extends BaseTest
      * @param string $format Format
      *
      * @return void
+     * @throws AlltubeLibraryException
      * @dataProvider urlProvider
      * @dataProvider m3uUrlProvider
-     * @throws PasswordException
      */
     public function testGetJson($url, $format)
     {
-        $video = new Video($url, $format);
+        $video = new Video($this->downloader, $url, $format);
         $info = $video->getJson();
         $this->assertObjectHasAttribute('webpage_url', $info);
         $this->assertObjectHasAttribute('url', $info);
@@ -246,13 +276,13 @@ class VideoTest extends BaseTest
      * @param string $url URL
      *
      * @return void
-     * @dataProvider      ErrorURLProvider
-     * @throws PasswordException
+     * @throws AlltubeLibraryException
+     * @dataProvider ErrorURLProvider
      */
     public function testGetJsonError($url)
     {
-        $this->expectException(Exception::class);
-        $video = new Video($url);
+        $this->expectException(YoutubedlException::class);
+        $video = new Video($this->downloader, $url, $this->format);
         $video->getJson();
     }
 
@@ -265,14 +295,14 @@ class VideoTest extends BaseTest
      * @param string $extension File extension
      *
      * @return void
+     * @throws AlltubeLibraryException
      * @dataProvider urlProvider
      * @dataProvider m3uUrlProvider
      * @dataProvider remuxUrlProvider
-     * @throws PasswordException
      */
     public function testGetFilename($url, $format, $filename, $extension)
     {
-        $video = new Video($url, $format);
+        $video = new Video($this->downloader, $url, $format);
         $this->assertEquals($video->getFilename(), $filename . '.' . $extension);
     }
 
@@ -282,13 +312,13 @@ class VideoTest extends BaseTest
      * @param string $url URL
      *
      * @return void
-     * @dataProvider      ErrorUrlProvider
-     * @throws PasswordException
+     * @throws AlltubeLibraryException
+     * @dataProvider ErrorUrlProvider
      */
     public function testGetFilenameError($url)
     {
-        $this->expectException(Exception::class);
-        $video = new Video($url);
+        $this->expectException(YoutubedlException::class);
+        $video = new Video($this->downloader, $url, $this->format);
         $video->getFilename();
     }
 
@@ -300,73 +330,80 @@ class VideoTest extends BaseTest
      *
      * @return void
      * @dataProvider urlProvider
-     * @throws Exception
+     * @throws AlltubeLibraryException
      */
     public function testGetAudioStream($url, $format)
     {
-        $video = new Video($url, $format);
-        $this->assertStream($video->getAudioStream());
+        $video = new Video($this->downloader, $url, $format);
+        $this->assertStream($this->downloader->getAudioStream($video));
     }
 
     /**
      * Test getAudioStream function without avconv.
      *
-     * @param string $url    URL
+     * @param string $url URL
      * @param string $format Format
      *
      * @return void
-     * @dataProvider      urlProvider
+     * @throws AlltubeLibraryException|ConfigException
+     * @dataProvider urlProvider
      */
     public function testGetAudioStreamAvconvError($url, $format)
     {
-        $this->expectException(Exception::class);
+        $this->expectException(AvconvException::class);
         Config::setOptions(['avconv' => 'foobar']);
+        $config = Config::getInstance();
+        $downloader = $config->getDownloader();
 
-        $video = new Video($url, $format);
-        $video->getAudioStream();
+        $video = new Video($this->downloader, $url, $format, $this->format);
+        $downloader->getAudioStream($video);
     }
 
     /**
      * Test getAudioStream function with a M3U8 file.
      *
-     * @param string $url    URL
+     * @param string $url URL
      * @param string $format Format
      *
      * @return void
+     * @throws AlltubeLibraryException
      * @dataProvider m3uUrlProvider
      */
     public function testGetAudioStreamM3uError($url, $format)
     {
-        $this->expectException(Exception::class);
-        $video = new Video($url, $format);
-        $video->getAudioStream();
+        $this->expectException(InvalidProtocolConversionException::class);
+        $video = new Video($this->downloader, $url, $format);
+        $this->downloader->getAudioStream($video);
     }
 
     /**
      * Test getAudioStream function with a DASH URL.
      *
      * @return void
+     * @throws AlltubeLibraryException
      */
     public function testGetAudioStreamDashError()
     {
-        $this->expectException(Exception::class);
-        $video = new Video('https://vimeo.com/251997032', 'bestaudio/best');
-        $video->getAudioStream();
+        $this->expectException(InvalidProtocolConversionException::class);
+        $video = new Video($this->downloader, 'https://vimeo.com/251997032', 'bestaudio/best');
+        $this->downloader->getAudioStream($video);
     }
 
     /**
      * Test getAudioStream function with a playlist.
      *
      * @return void
+     * @throws AlltubeLibraryException
      */
     public function testGetAudioStreamPlaylistError()
     {
-        $this->expectException(Exception::class);
+        $this->expectException(PlaylistConversionException::class);
         $video = new Video(
+            $this->downloader,
             'https://www.youtube.com/playlist?list=PLgdySZU6KUXL_8Jq5aUkyNV7wCa-4wZsC',
             'best'
         );
-        $video->getAudioStream();
+        $this->downloader->getAudioStream($video);
     }
 
     /**
@@ -390,12 +427,12 @@ class VideoTest extends BaseTest
      *
      * @return void
      * @dataProvider m3uUrlProvider
-     * @throws Exception
+     * @throws AlltubeLibraryException
      */
     public function testGetM3uStream($url, $format)
     {
-        $video = new Video($url, $format);
-        $this->assertStream($video->getM3uStream());
+        $video = new Video($this->downloader, $url, $format);
+        $this->assertStream($this->downloader->getM3uStream($video));
     }
 
     /**
@@ -406,28 +443,29 @@ class VideoTest extends BaseTest
      *
      * @return void
      * @dataProvider remuxUrlProvider
-     * @throws Exception
+     * @throws AlltubeLibraryException
      */
     public function testGetRemuxStream($url, $format)
     {
-        $video = new Video($url, $format);
-        $this->assertStream($video->getRemuxStream());
+        $video = new Video($this->downloader, $url, $format);
+        $this->assertStream($this->downloader->getRemuxStream($video));
     }
 
     /**
      * Test getRemuxStream function with a video with only one URL.
      *
-     * @param string $url    URL
+     * @param string $url URL
      * @param string $format Format
      *
      * @return void
+     * @throws AlltubeLibraryException
      * @dataProvider urlProvider
      */
     public function testGetRemuxStreamWithWrongVideo($url, $format)
     {
-        $this->expectException(Exception::class);
-        $video = new Video($url, $format);
-        $video->getRemuxStream();
+        $this->expectException(RemuxException::class);
+        $video = new Video($this->downloader, $url, $format);
+        $this->downloader->getRemuxStream($video);
     }
 
     /**
@@ -437,34 +475,37 @@ class VideoTest extends BaseTest
      * @param string $format Format
      *
      * @return void
+     * @throws AlltubeLibraryException
      * @dataProvider rtmpUrlProvider
-     * @throws Exception
      */
     public function testGetRtmpStream($url, $format)
     {
         $this->markTestIncomplete('We need to find another RTMP video.');
 
-        $video = new Video($url, $format);
+        $video = new Video($this->downloader, $url, $format);
 
-        $this->assertStream($video->getRtmpStream());
+        $this->assertStream($this->downloader->getRtmpStream($video));
     }
 
     /**
      * Test getM3uStream function without avconv.
      *
-     * @param string $url    URL
+     * @param string $url URL
      * @param string $format Format
      *
      * @return void
+     * @throws AlltubeLibraryException|ConfigException
      * @dataProvider m3uUrlProvider
      */
     public function testGetM3uStreamAvconvError($url, $format)
     {
-        $this->expectException(Exception::class);
+        $this->expectException(AvconvException::class);
         Config::setOptions(['avconv' => 'foobar']);
+        $config = Config::getInstance();
+        $downloader = $config->getDownloader();
 
-        $video = new Video($url, $format);
-        $video->getM3uStream();
+        $video = new Video($downloader, $url, $format);
+        $downloader->getM3uStream($video);
     }
 
     /**
@@ -475,27 +516,28 @@ class VideoTest extends BaseTest
      *
      * @return void
      * @dataProvider urlProvider
-     * @throws Exception
+     * @throws AlltubeLibraryException
      */
     public function testGetConvertedStream($url, $format)
     {
-        $video = new Video($url, $format);
-        $this->assertStream($video->getConvertedStream(32, 'flv'));
+        $video = new Video($this->downloader, $url, $format);
+        $this->assertStream($this->downloader->getConvertedStream($video, 32, 'flv'));
     }
 
     /**
      * Test getConvertedStream function with a M3U8 file.
      *
-     * @param string $url    URL
+     * @param string $url URL
      * @param string $format Format
      *
      * @return void
+     * @throws AlltubeLibraryException
      * @dataProvider m3uUrlProvider
      */
     public function testGetConvertedStreamM3uError($url, $format)
     {
-        $this->expectException(Exception::class);
-        $video = new Video($url, $format);
-        $video->getConvertedStream(32, 'flv');
+        $this->expectException(InvalidProtocolConversionException::class);
+        $video = new Video($this->downloader, $url, $format);
+        $this->downloader->getConvertedStream($video, 32, 'flv');
     }
 }
diff --git a/tests/YoutubeChunkStreamTest.php b/tests/YoutubeChunkStreamTest.php
index 41a2f38..aec785d 100644
--- a/tests/YoutubeChunkStreamTest.php
+++ b/tests/YoutubeChunkStreamTest.php
@@ -6,9 +6,10 @@
 
 namespace Alltube\Test;
 
+use Alltube\Config;
+use Alltube\Exception\ConfigException;
+use Alltube\Library\Exception\AlltubeLibraryException;
 use Alltube\Stream\YoutubeChunkStream;
-use Alltube\Video;
-use Exception;
 
 /**
  * Unit tests for the YoutubeChunkStream class.
@@ -18,14 +19,17 @@ class YoutubeChunkStreamTest extends StreamTest
 {
     /**
      * Prepare tests.
-     * @throws Exception
+     * @throws ConfigException
+     * @throws AlltubeLibraryException
      */
     protected function setUp(): void
     {
         parent::setUp();
 
-        $video = new Video('https://www.youtube.com/watch?v=dQw4w9WgXcQ');
+        $config = Config::getInstance();
+        $downloader = $config->getDownloader();
+        $video = $downloader->getVideo('https://www.youtube.com/watch?v=dQw4w9WgXcQ');
 
-        $this->stream = new YoutubeChunkStream($video->getHttpResponse());
+        $this->stream = new YoutubeChunkStream($downloader->getHttpResponse($video));
     }
 }
diff --git a/tests/YoutubeStreamTest.php b/tests/YoutubeStreamTest.php
index b8b4d13..d551e0c 100644
--- a/tests/YoutubeStreamTest.php
+++ b/tests/YoutubeStreamTest.php
@@ -6,9 +6,10 @@
 
 namespace Alltube\Test;
 
+use Alltube\Config;
+use Alltube\Exception\ConfigException;
+use Alltube\Library\Exception\AlltubeLibraryException;
 use Alltube\Stream\YoutubeStream;
-use Alltube\Video;
-use Exception;
 
 /**
  * Unit tests for the YoutubeStream class.
@@ -18,15 +19,17 @@ class YoutubeStreamTest extends StreamTest
 {
     /**
      * Prepare tests.
-     * @throws Exception
+     * @throws ConfigException|AlltubeLibraryException
      */
     protected function setUp(): void
     {
         parent::setUp();
 
-        $video = new Video('https://www.youtube.com/watch?v=dQw4w9WgXcQ', '135');
+        $config = Config::getInstance();
+        $downloader = $config->getDownloader();
+        $video = $downloader->getVideo('https://www.youtube.com/watch?v=dQw4w9WgXcQ', '135');
 
-        $this->stream = new YoutubeStream($video);
+        $this->stream = new YoutubeStream($downloader, $video);
     }
 
     /**

From d4b3a82ebbf33f556e1b2bf51fee431145bcbccd Mon Sep 17 00:00:00 2001
From: Pierre Rudloff <contact@rudloff.pro>
Date: Sun, 21 Jun 2020 15:04:01 +0200
Subject: [PATCH 2/2] Remove obsolete Composer config

---
 composer.json | 7 -------
 composer.lock | 2 +-
 2 files changed, 1 insertion(+), 8 deletions(-)

diff --git a/composer.json b/composer.json
index 83f059b..a5122bb 100644
--- a/composer.json
+++ b/composer.json
@@ -34,13 +34,6 @@
     "symfony/error-handler": "^5.0",
     "symfony/var-dumper": "^5.0"
   },
-  "extra": {
-    "paas": {
-      "nginx-includes": [
-        "resources/nginx.conf"
-      ]
-    }
-  },
   "repositories": [
     {
       "type": "composer",
diff --git a/composer.lock b/composer.lock
index d164fd2..b612219 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "dba22d2bff872c8e1310567d4336db16",
+    "content-hash": "03b37b613f8ae3881395adf1cbc72b67",
     "packages": [
         {
             "name": "anam/phantomjs-linux-x86-binary",