<!-- 16:9 aspect ratio -->
<div style="max-width: 770px">
  <div class="embed-responsive embed-responsive-16by9">
    <iframe width="770" height="433" src="//www.youtube.com/embed/hoRH32HYGHI" frameborder="0" allowfullscreen></iframe>
  </div>
</div>

<!-- 16:9 aspect ratio -->
<div style="max-width: 640px">
  <div class="embed-responsive embed-responsive-16by9">
    <iframe width="640" height="360" src="//www.youtube.com/embed/hoRH32HYGHI" frameborder="0" allowfullscreen></iframe>
  </div>
</div>

<!-- 16:9 aspect ratio -->
<div style="max-width: 460px">
  <div class="embed-responsive embed-responsive-16by9">
    <iframe width="460" height="259" src="//www.youtube.com/embed/hoRH32HYGHI" frameborder="0" allowfullscreen></iframe>
  </div>
</div>

<div class="row">
	<div class="col-md-6">
		<div class="embed-responsive embed-responsive-16by9">
			<iframe frameborder="0" width="366" height="206" src="//www.youtube.com/embed/hoRH32HYGHI"></iframe>
		</div>
	</div>
	<div class="col-md-6">
		<div class="embed-responsive embed-responsive-16by9">
			<iframe frameborder="0" width="366" height="206" src="//www.youtube.com/embed/hoRH32HYGHI"></iframe>
		</div>
	</div>
</div>