background cover video

background cover video

// background cover for position:fixed video
// aspectRatio = original aspect ratio of video

var	ww  = $(window).width(),
	wh  = $(window).height(),
	wAR = ww / wh,

	newW = (wAR < aspectRatio) ? 'auto' : ww,
	newH = (wAR < aspectRatio) ? wh : 'auto',
	mT   = (wAR < aspectRatio) ? 0 : Math.round((el.height() - wh) / 2) * -1,
	mL   = (wAR < aspectRatio) ? Math.round((el.width() - ww) / 2) * -1 : 0;

el.css({
	'height': newH,
	'width': newW,
	'margin': mT+'px 0 0 '+mL+'px'
});