title: Video formats for html5 video players
body: <p>I am creating a website, where users can upload their videos. I'm using the HTML5 video player from <a href="http://videojs.com/" rel="nofollow">http://videojs.com/</a>. How can I make HTML5 player play only MP4 on all browsers? If that is impossible, are there any ways to maybe convert MP4 to other formats?</p>