.video_widescreen {
	position: relative;
	padding-bottom: 56.25%; /* 16:9 */
	padding-top: 25px;
	height: 0;
	display: block;
	width: 100%;
	overflow: hidden;

}
.video_standard {
	position: relative;
	padding-bottom: 75%; /* 16:9 */
	padding-top: 25px;
	height: 0;
}
.video_widescreen iframe, .video_standard iframe {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
}