title: HTTP Content-Type video/mp4 warning in firefox
body: <p>I have a video that is embeddedin in a webpage.</p>
  
  <p>My htaccess:</p>
  
  <pre><code>&lt;IfModule mod_rewrite.c&gt;
      RewriteEngine On
      RewriteCond %{REQUEST_FILENAME} !-f
      RewriteRule ^(.*)$ app.php [QSA,L]
      AddType video/ogg .ogv
      AddType video/mp4 .mp4
      AddType video/webm .webm
  &lt;/IfModule&gt;
  </code></pre>
  
  <p>HTML:</p>
  
  <pre><code>&lt;video autoplay="false" width="586px" height="440" src="...mp4"&gt;&lt;/video&gt;
  </code></pre>
  
  <p>I use the mediaelement.js player:</p>
  
  <pre><code>$('video').mediaelementplayer();
  </code></pre>
  
  <p>In firefox the video does not preload and it does not show the preview image. The player is just black. In firebug I get this warning:</p>
  
  <blockquote>
    <p>HTTP "Content-Type" "video/mp4" is not supported. Failed to download
    media ...</p>
  </blockquote>
  
  <p>Any idea how to solve this problem?</p>