title: iframe center in bootstrap
body: <p>I'm having difficulty getting this iframe (youtube video) to center.
  I'm using bootstrap and here's my code:</p>
  
  <pre><code>&lt;div class="su-youtube su-responsive-media-yes"&gt;&lt;iframe
      width="400"
      height="320"
      src="http://www.youtube.com/embed/SGOc9P4Ynm?modestbranding=1&amp;controls=0&amp;iv_load_policy=3&amp;rel=0&amp;showinfo=0&amp;color=white"
      frameborder="0"&gt;&lt;/iframe&gt; &lt;/div&gt;
  </code></pre>
  
  <p>I've tried adding the class "center-block" and "text-center" too and also tried removing the iframe from the div. Any ideas?</p>