title: HTML5 <video> tag not working on Firefox
body: <p>I am using HTML5  tag, for some reason its not working on firefox, it start playing video ,but it stops after 3 seconds. How to fix it ?</p>
  
  <p>Here is my code:</p>
  
  <pre><code>    &lt;video width="100%"  controls&gt;
        &lt;source src="videos/test_video.mp4" type="video/mp4"&gt;
        Your browser does not support the video tag.
      &lt;/video&gt; 
  </code></pre>