HTML5: video source not working in the Firefox 21.0, Ubuntu -

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i new "html5". when trying implement simple video tag got error "no video supported format , mime type found". code is

<!doctype html> <html> <body>  <video width="320" height="240" controls="controls">     <!source src="movie.ogg" type="video/ogg" />     <source src="http://video-js.zencoder.com/oceans-clip.mp4" type="video/mp4 codecs='avc1.42e01e,mp4a.40.2'" />     <!source src="movie.webm" type="video/webm" />     browser not support video tag. </video>  </body> </html>

please me
using firefox version 21.0 browser , ubuntu ultimate edition 3.0 os

firefox not support mp4 video format in html5. http://www.w3schools.com/html/html5_video.asp

edit: looks firefox supports mp4 in cases (thanks @winterblood). if use firefox 21, mp4 should work windows 7+, android , firefox os.


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