title: Firefox won't play .webm and .ogv videos with HTML5
body: <p>I prepared 3 video formats for my site:</p>
  
  <pre><code>/assets/video/background-purple.ogg
  /assets/video/background-purple.webm
  /assets/video/background-purple.mp4
  </code></pre>
  
  <p>on the site <a href="http://tekhy.net/" rel="nofollow">http://tekhy.net/</a></p>
  
  <p>I use &lt;video&gt; tag for play the video:</p>
  
  <pre><code>&lt;video webkit-playsinline autoplay="autoplay" loop="true" poster="/assets/video/transparent.png"&gt;
      &lt;source src="/assets/video/background-purple.ogg" type="video/ogg"&gt;
      &lt;source src="/assets/video/background-purple.mp4" type="video/mp4"&gt;
      &lt;source src="/assets/video/background-purple.webm" type="video/webm"&gt;
  &lt;/video&gt;
  </code></pre>
  
  <p>And I've setted the correct mimetype for my videos into <code>.htaccess</code>:</p>
  
  <pre><code>AddType video/mp4 .mp4 .m4v
  AddType video/webm .webm
  AddType video/ogg .ogv .ogg
  </code></pre>
  
  <p>In Google Chrome and Chromium all works well, on Firefox Mobile works well too. On Firefox Nightly 21.0a works well.
  But on Firefox 18.0.1 on Elementary OS Luna it won't work.</p>
  
  <p>Firebug tells me that it can't decode webm and ogg/ogv media (mp4 is not supported by Firefox atm).</p>
  
  <p>I've tried also with background-purple.ogv type="video/ogv" but the problem remain.</p>
  
  <p>My webm video is:</p>
  
  <blockquote>
    <p>Google/On2's VP8 Video (VP80)<br>
    Planar 4:2:0 YUV</p>
  </blockquote>
  
  <p>Currently I've really not idea on how solve this problem.
  Any suggestion?</p>