Try it in Google Chrome. In my PC, I have the latest Chrome(20.0.1132.57 m).
Originally Posted by Aash
If you want to play the same video in Firefox(4+) or Opera(10.6+), you have to include the WebM or Ogg format video as separate <source>.
You could see the browsers supporting the specific video format in the link that I have shown you(w3schools).
So, it would be like this:
<video width="480" height="410" controls="controls">
<source src="http://video-js.zencoder.com/oceans-clip.mp4" type="video/mp4" />
<source src="http://video-js.zencoder.com/oceans-clip.ogg" type="video/ogg" />