title: What is the gesture="media" HTML attribute?
body: <p>When using oembed to get embed codes for Youtube, I get this HTML:</p>
  
  <pre><code>&lt;iframe allowfullscreen="" frameborder="0" gesture="media" height="270" src="https://www.youtube.com/embed/4B36Lr0Unp4?feature=oembed" width="480"&gt;&lt;/iframe&gt;
  </code></pre>
  
  <p>Do you notice the <code>gesture="media"</code> HTML attribute? What is it? What does the <code>"media"</code> value do?</p>