.youtube_sp{
	width:640px;
	height:360px;
	}	
@media only screen and (min-width: 0px) and (max-width: 420px) {
.youtube_sp{
	width:100% !important;
	height:auto !important;
}

@media only screen and (min-width: 0px) and (max-width: 768px) {
	width:100% !important;
	height:auto !important;
}