#media { height:400vh; }
#media .contenedor-responsive { 
	height:calc(100% - 20px); 
	margin-bottom:20px;
	background:white;
	box-shadow: 1px 1px 4px rgba(0,0,0,.1);
}
#media .contenedor-responsive iframe {
	margin:20px;
	overflow:hidden;
	height:calc(100% - 40px);
	width:calc(100% - 40px);
}