title: Youtube Iframe on HTTPS website
body: <p>I included an iframe pointing to a youtube video on a website using https. Although I embedded the youtube video with "https://", the video loads http-files when I click on play, rendering the browser security icon "unsafe". How do I force youtube to only load https files?</p>
  
  <p>My embed HTML:</p>
  
  <pre><code>&lt;iframe id="ytplayer" type="text/html" width="480" height="360" src="//www.youtube.com/embed/-ZUrjLs48a8" frameBorder="0" allowfullscreen&gt;&lt;/iframe&gt;
  </code></pre>