title: Video does not autoplay in Edge despite use of autoplay attribute
body: <p>I make use of HTML5 video to display a large video at the top of a page. It works very well on Safari, IE and Chrome but on Microsoft Edge it won't allow me to autoplay. </p>
  
  <p>I checked if there is any problem with the file which is encoded in h.264 but there aren't any issues. I've tried an example of W3 school which has the autoplay attribute and this works just fine. Also have I fiddled a bit with the attributes, maybe they were in the wrong order.</p>
  
  <pre><code>&lt;video id="video" class="intro__video" src="path/to/video.mp4" muted
  autoplay loop 
  preload="auto" plays-inline&gt;&lt;/video&gt;
  </code></pre>
  
  <p>When I add the controls attribute, I can start the video manual and it will play with no problems. However, this is not what I want.</p>