title: Add Quality as a control button on a video tag
body: <p>Is there any way to add different qualities for a video tag in html ?
  I tried :</p>
  <pre><code>   &lt;video controls preload&gt;
        &lt;source  src=&quot;http://v.com/lorem.mp4&quot; type=&quot;video/mp4&quot;&gt;
        &lt;source  src=&quot;http://v.com/ipsum.mp4&quot; type=&quot;video/mp4&quot; &gt;
        &lt;source  src=&quot;http://v.com/dolor.mp4&quot; type=&quot;video/mp4&quot;&gt;
     &lt;/video&gt;
  </code></pre>
  <p>but only one video appeared</p>