@media only screen and (max-width: 700px) {
	#slider {
		display: inline-block;
	}
	#video_bg {
		 width: 100%;
		display: inline-block;
	}
}

@media only screen and (min-width: 701px) {
	#video_bg {
		position:fixed;
		top:50%;
		left:50%;
		min-width:100%;
		min-height:100%;
		width:auto;
		height:auto;
		transform: translateX(-50%) translateY(-50%);
		z-index:-100;
	}
}