<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<title>Title of the document</title>
</head>
<body>
<div class="embed-responsive embed-responsive-16by9">
<iframe class="embed-responsive-item" src="https://www.youtube.com/embed/UF8uR6Z6KLc" allowfullscreen></iframe>
</div>
</body>
</html>