#video_container{
	position: relative;
	display: block;
	width: 80%;
	margin:25px auto;
	padding-bottom: calc(56.25% * 0.8);
	border: #aaa solid 1px;
	border-radius: 3px;
}
#video_container canvas{
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
}