title: IE11 on my machine not playing H.264 video that works on other PCs
body: <p>I have encoded videos as H.264 that aren't playing in IE11 on Windows <em>on my machine only</em>. They play just fine on other Windows 8 or 7 machines that I've been able to test on - and they play fine in Chrome/Firefox.</p>
  
  <p>Yes I have the right MIME type.</p>
  
  <p>It's definitely something wrong with my Internet Explorer because even the <a href="http://www.w3schools.com/html/html5_video.asp" rel="nofollow">canonical HTML5 video</a> from w3schools fails on my Internet Explorer. However another MP4 video from HTML5VideoCreator works fine.</p>
  
  <p>Here's a test page - for me only the Happy Fit [sic] video works in IE.</p>
  
  <p>I just can't figure out what's different between these two encoded videos. Even if I use handbrake and re-encode the video as H.254 with 'web optimized' enabled it still won't play.</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;p&gt;This works on my machine (Win 8 / IE 11)&lt;/p&gt;
  
  &lt;video class="benefit-video" controls data-crossorigin="anonymous" preload="metadata" width="400" height="300"&gt;
      &lt;source src="http://html5videocreator.github.io/data/images/happyfit2.mp4" type="video/mp4"&gt;
  &lt;/video&gt;
  
  &lt;hr&gt;
  
  &lt;p&gt;This doesn't work on my machine (Win 8 / IE 11)&lt;/p&gt;
  
  &lt;video class="benefit-video" controls data-crossorigin="anonymous" preload="metadata" width="400" height="300"&gt;
       &lt;source src="http://www.w3schools.com/html/mov_bbb.mp4" type="video/mp4"&gt;
  &lt;/video&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p><a href="http://www.w3schools.com/html/html5_video.asp" rel="nofollow">http://www.w3schools.com/html/html5_video.asp</a></p>