Embeds Video 


<div class="embed-responsive embed-responsive-16by9">
   <iframe class="embed-responsive-item" src="https://www.youtube.com/embed/zpOULjyy-n8?rel=0" allowfullscreen></iframe>
</div>

Wrap any embed like an <iframe> in a parent element with .embed-responsive and an aspect ratio. The .embed-responsive-item isn’t strictly required, but we encourage it.

Responsive Aspect ratios 4:3 


<div class="embed-responsive embed-responsive-4by3">
   <iframe class="embed-responsive-item" src="https://www.youtube.com/embed/zpOULjyy-n8?rel=0" allowfullscreen></iframe>
</div>

Progress components are built with two HTML elements, some CSS to set the width, and a few attributes.

Responsive Aspect ratios 21:9 


<div class="embed-responsive embed-responsive-21by9">
   <iframe class="embed-responsive-item" src="https://www.youtube.com/embed/zpOULjyy-n8?rel=0" allowfullscreen></iframe>
</div>

Progress components are built with two HTML elements, some CSS to set the width, and a few attributes.

Responsive Aspect ratios 1:1 


<div class="embed-responsive embed-responsive-1by1">
   <iframe class="embed-responsive-item" src="https://www.youtube.com/embed/zpOULjyy-n8?rel=0" allowfullscreen></iframe>
</div>

Progress components are built with two HTML elements, some CSS to set the width, and a few attributes.