diff --git a/Makefile b/Makefile
index 32a9648..bd8208c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,5 @@
 
+LATEX=lualatex
 TARGET=presentation.tex
 
 DOT=$(wildcard figs/*.dot)
@@ -15,13 +16,17 @@ all: paper
 
 	twopi -Tsvg -o$(@) $(<)
 
+thumbs:
+
+	python make_video_preview.py ${TARGET}
+
 bib: $(TARGET:.tex=.aux)
 
 	BSTINPUTS=:./sty bibtex $(TARGET:.tex=.aux)
 
 paper: $(TARGET) $(SVG:.svg=.pdf) $(DOT:.dot=.pdf)
 
-	TEXINPUTS=:./sty xelatex $(TARGET)
+	TEXINPUTS=:./sty $(LATEX) $(TARGET)
 
 clean:
 	rm -f *.spl *.idx *.aux *.log *.snm *.out *.toc *.nav *intermediate *~ *.glo *.ist *.bbl *.blg $(SVG:.svg=.pdf) $(DOT:.dot=.svg) $(DOT:.dot=.pdf)
diff --git a/make_video_preview.py b/make_video_preview.py
new file mode 100644
index 0000000..ec2d088
--- /dev/null
+++ b/make_video_preview.py
@@ -0,0 +1,18 @@
+import sys
+import re
+from subprocess import call
+
+video = re.compile('.*video.*{(?P<file>.*\..*?)(\?.*?(start=(?P<starttime>\d*).*)?)?}')
+with open(sys.argv[1],'r') as tex:
+    for line in tex.readlines():
+        found = video.search(line)
+        if found:
+            starttime = found.group('starttime')
+            if starttime:
+                starttime = int(starttime)
+            else:
+                starttime = 0
+            cmd = "avconv -i " + found.group('file') + " -r 1 -vframes 1 -ss " + str(starttime) + " " + found.group('file').split('.')[0] + "_thumb.jpg"
+            print("%s starting at %d" % (found.group('file'), starttime))
+            print("> " + cmd)
+            call(cmd, shell=True)