diff --git a/yt_dlp/extractor/extractors.py b/yt_dlp/extractor/extractors.py
index 4c89c5a18..03d4a67f5 100644
--- a/yt_dlp/extractor/extractors.py
+++ b/yt_dlp/extractor/extractors.py
@@ -983,6 +983,7 @@ from .odatv import OdaTVIE
 from .odnoklassniki import OdnoklassnikiIE
 from .oktoberfesttv import OktoberfestTVIE
 from .olympics import OlympicsReplayIE
+from .on24 import On24IE
 from .ondemandkorea import OnDemandKoreaIE
 from .onet import (
     OnetIE,
diff --git a/yt_dlp/extractor/on24.py b/yt_dlp/extractor/on24.py
new file mode 100644
index 000000000..d4d824430
--- /dev/null
+++ b/yt_dlp/extractor/on24.py
@@ -0,0 +1,91 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+from .common import InfoExtractor
+from ..utils import (
+    int_or_none,
+    strip_or_none,
+    try_get,
+    urljoin,
+)
+
+
+class On24IE(InfoExtractor):
+    IE_NAME = 'on24'
+    IE_DESC = 'ON24'
+
+    _VALID_URL = r'''(?x)
+                    https?://event\.on24\.com/(?:
+                        wcc/r/(?P<id_1>\d{7})/(?P<key_1>[0-9A-F]{32})|
+                        eventRegistration/(?:console/EventConsoleApollo|EventLobbyServlet\?target=lobby30)
+                            \.jsp\?(?:[^/#?]*&)?eventid=(?P<id_2>\d{7})[^/#?]*&key=(?P<key_2>[0-9A-F]{32})
+                    )'''
+
+    _TESTS = [{
+        'url': 'https://event.on24.com/eventRegistration/console/EventConsoleApollo.jsp?uimode=nextgeneration&eventid=2197467&sessionid=1&key=5DF57BE53237F36A43B478DD36277A84&contenttype=A&eventuserid=305999&playerwidth=1000&playerheight=650&caller=previewLobby&text_language_id=en&format=fhaudio&newConsole=false',
+        'info_dict': {
+            'id': '2197467',
+            'ext': 'wav',
+            'title': 'Pearson Test of English General/Pearson English International Certificate Teacher Training Guide',
+            'upload_date': '20200219',
+            'timestamp': 1582149600.0,
+            'view_count': int,
+        }
+    }, {
+        'url': 'https://event.on24.com/wcc/r/2639291/82829018E813065A122363877975752E?mode=login&email=johnsmith@gmail.com',
+        'only_matching': True,
+    }, {
+        'url': 'https://event.on24.com/eventRegistration/console/EventConsoleApollo.jsp?&eventid=2639291&sessionid=1&username=&partnerref=&format=fhvideo1&mobile=&flashsupportedmobiledevice=&helpcenter=&key=82829018E813065A122363877975752E&newConsole=true&nxChe=true&newTabCon=true&text_language_id=en&playerwidth=748&playerheight=526&eventuserid=338788762&contenttype=A&mediametricsessionid=384764716&mediametricid=3558192&usercd=369267058&mode=launch',
+        'only_matching': True,
+    }]
+
+    def _real_extract(self, url):
+        mobj = self._match_valid_url(url)
+        event_id = mobj.group('id_1') or mobj.group('id_2')
+        event_key = mobj.group('key_1') or mobj.group('key_2')
+
+        event_data = self._download_json(
+            'https://event.on24.com/apic/utilApp/EventConsoleCachedServlet',
+            event_id, query={
+                'eventId': event_id,
+                'displayProfile': 'player',
+                'key': event_key,
+                'contentType': 'A'
+            })
+        event_id = str(try_get(event_data, lambda x: x['presentationLogInfo']['eventid'])) or event_id
+        language = event_data.get('localelanguagecode')
+
+        formats = []
+        for media in event_data.get('mediaUrlInfo', []):
+            media_url = urljoin('https://event.on24.com/media/news/corporatevideo/events/', str(media.get('url')))
+            if not media_url:
+                continue
+            media_type = media.get('code')
+            if media_type == 'fhvideo1':
+                formats.append({
+                    'format_id': 'video',
+                    'url': media_url,
+                    'language': language,
+                    'ext': 'mp4',
+                    'vcodec': 'avc1.640020',
+                    'acodec': 'mp4a.40.2',
+                })
+            elif media_type == 'audio':
+                formats.append({
+                    'format_id': 'audio',
+                    'url': media_url,
+                    'language': language,
+                    'ext': 'wav',
+                    'vcodec': 'none',
+                    'acodec': 'wav'
+                })
+        self._sort_formats(formats)
+
+        return {
+            'id': event_id,
+            'title': strip_or_none(event_data.get('description')),
+            'timestamp': int_or_none(try_get(event_data, lambda x: x['session']['startdate']), 1000),
+            'webpage_url': f'https://event.on24.com/wcc/r/{event_id}/{event_key}',
+            'view_count': event_data.get('registrantcount'),
+            'formats': formats,
+        }