.bt-media-responsive{
	position: relative;
	overflow: hidden;
	padding-bottom: 56.25%;
}
.bt-media-responsive iframe{
	width: 100%;
	height: 100%;
	position: absolute;
	top: 0; left: 0;
}
.bt-video-responsive video{
	width: 100%;
	height: auto;
}