Embed
Create responsive video or slideshow embeds based on the width of the parent by creating an intrinsic ratio that scales on any device.
Embed on BootstrapExample
Wrap any embed, like an <iframe>, in a parent element with .ratio and an aspect ratio class. The immediate child element is automatically sized thanks to our universal selector .ratio > *.
<div class="ratio ratio-16x9">
<iframe src="https://www.youtube.com/embed/zpOULjyy-n8?rel=0" allowfullscreen="allowfullscreen" title="YouTube video"></iframe>
</div>
