<div class="bs-docs-section"> <h1 id="responsive-embed" class="page-header">Responsive embed</h1> <p>Allow browsers to determine video or slideshow dimensions based on the width of their containing block by creating an intrinsic ratio that will properly scale on any device.</p> <p>Rules are directly applied to <code><iframe></code>, <code><embed></code>, <code><video></code>, and <code><object></code> elements; optionally use an explicit descendant class <code>.embed-responsive-item</code> when you want to match the styling for other attributes.</p> <p><strong>Pro-Tip!</strong> You don't need to include <code>frameborder="0"</code> in your <code><iframe></code>s as we override that for you.</p> <div class="bs-example" data-example-id="responsive-embed-16by9-iframe-youtube"> <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> </div> {% highlight html %} <!-- 16:9 aspect ratio --> <div class="embed-responsive embed-responsive-16by9"> <iframe class="embed-responsive-item" src="..."></iframe> </div> <!-- 4:3 aspect ratio --> <div class="embed-responsive embed-responsive-4by3"> <iframe class="embed-responsive-item" src="..."></iframe> </div> {% endhighlight %} </div>