title: Force opening app for embedded youtube video
body: <p>I would like to embed a youtube video (with the standard iframe). Can I ensure that the video is played in the youtube app, if it is clicked on using a smartphone?<br>
  For completeness my video including code (using bootstrap 3.3.1.):   </p>
  
  <pre><code>&lt;div class="embed-responsive embed-responsive-16by9"&gt;
      &lt;iframe class="embed-responsive-item" src="https://www.youtube.com/embed/&lt;?php echo $Elem-&gt;video; ?&gt;"&gt; 
      &lt;/iframe&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>Thank you</p>