.overlay{
	position:fixed;
	background-color:rgba(0,0,0,.9);
	width:100%;
	height:100%;
	top:0;
	left:0;
	z-index:40000;
}

.video-elem{
	position:fixed;
	z-index:40020;
	top:50%;
	left:50%;
	transform: translate(-50%, -50%);
}