
<!DOCTYPE html>
<html>
<head>
<style>
.video-responsive{
    overflow:hidden;
    padding-bottom:56.25%;
    position:relative;
    height:0;
}
.video-responsive iframe{
    left:0;
    top:0;
    height:100%;
    width:100%;
    position:absolute;
}
</style>
</head>
<body>
<div class="video-responsive">
<iframe width="560" height="315" src="https://www.youtube.com/embed/CJWa-3OJ81c" frameborder="0" allowfullscreen></iframe>
</div>
</body>
</html>
