<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"> <h1>.col-md-6</h1> <div class="row"> <div class="col-md-6">Hello</div> <h3> Responsive 16:9 Youtube </h3> <div class="col-md-6 embed-responsive embed-responsive-16by9">Youtube <iframe width="560" height="315" src="https://www.youtube.com/embed/nKIu9yen5nc" frameborder="0" allowfullscreen></iframe> </div> <div> <div class="col-md-6">Hello</div> <iframe width="560" height="315" src="https://www.youtube.com/embed/nKIu9yen5nc" frameborder="0" allowfullscreen></iframe> </div> </div> </div>