.video_bg { position: absolute; top: 0px; width: 100%; overflow: hidden; z-index:999; }
/*.video_bg { position: absolute; top: 0px; left:50%; margin-left:-960px; width: 1920px; height: 640px; overflow: hidden; z-index:999; }*/
.video_bg video {top: -240px; position: relative; opacity: 0.6; width: 1920px;}
.video_height {width: 100%; height: 370px;}

@media(max-width:690px){
	.video_bg { top: 0px; left:0%; margin-left:0px; width:100%; }
	.video_bg video {top: 0px; width:100%; }
	.video_height {height: auto;}

}