http://videojs.com/video-js/demo.html
guarda il codice sorgente, in questo caso il player swf viene istruito per eseguire il file .mp4 (quindi niente flv)
codice:
<video id="example_video_1" class="video-js" width="640" height="264" controls="controls" preload="auto" poster="http://video-js.zencoder.com/oceans-clip.png">
<source src="http://video-js.zencoder.com/oceans-clip.mp4" type='video/mp4; codecs="avc1.42E01E, mp4a.40.2"' />
<source src="http://video-js.zencoder.com/oceans-clip.webm" type='video/webm; codecs="vp8, vorbis"' />
<source src="http://video-js.zencoder.com/oceans-clip.ogv" type='video/ogg; codecs="theora, vorbis"' />
<object id="flash_fallback_1" class="vjs-flash-fallback" width="640" height="264" type="application/x-shockwave-flash"
data="http://releases.flowplayer.org/swf/flowplayer-3.2.1.swf">
<param name="movie" value="http://releases.flowplayer.org/swf/flowplayer-3.2.1.swf" />
<param name="allowfullscreen" value="true" />
<param name="flashvars" value='config={"playlist":["http://video-js.zencoder.com/oceans-clip.png", {"url": "http://video-js.zencoder.com/oceans-clip.mp4","autoPlay":false,"autoBuffering":true}]}' />
</object>
</video>