title: How to play MP4 video in firefox
body: <p>I have a dynamic video path coming from database. Video can be uploaded in any format. When I load the video in Firefox, I see the following errors</p>
  
  <p><strong>Specified “type” attribute of “video/mp4” is not supported. Load of media resource path_to_video.mp4 failed.</strong></p>
  
  <p>I am loading the video in my html like</p>
  
  <pre><code>&lt;p&gt;
   &lt;video class="responsive-video" id="trailer"&gt;
     &lt;source src="&lt;?php echo $biovideo?&gt;" type="video/mp4"&gt;
   &lt;/video&gt;
  &lt;/p&gt;
  </code></pre>
  
  <p>Is there any way to play the mp4 videos in Firefox as I am not sure what extension the video will have</p>