title: How to change the playing speed of videos in HTML5 on mobile?
body: <p>According to <a href="http://www.chipwreck.de/blog/2010/03/01/html-5-video-dom-attributes-and-events/" rel="nofollow">this site</a>, this is supported in the <code>playbackRate</code> and <code>defaultPlaybackRate</code> attributes, accessible via the DOM. But this is <strong><em>not working on mobile</em></strong>. Example:</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  
  &lt;video id="my-video" src="chubby-bubbies.ogv" ...&gt;&lt;/video&gt;
  
  &lt;script type="text/javascript"&gt;
    /* play video twice as fast */
    document.getElementById("my-video").defaultPlaybackRate = 2.0;
    document.getElementById("my-video").play();
  
    /* now play three times as fast just for the heck of it */
    document.getElementById("my-video").playbackRate = 3.0;
  &lt;/script&gt;
  </code></pre>
  
  <p>The above works on Chrome, and also <a href="https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Releases/20" rel="nofollow">Firefox 20 and above</a> on desktop.</p>