<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <iframe src="//www.youtube.com/embed/yCOY82UdFrw" frameborder="0" allowfullscreen class="video"></iframe> </div>

.container { position: relative; width: 100%; height: 0; padding-bottom: 56.25%; } .video { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }