video.js

function resizePlayer(iframes, ratio) {
			if (!iframes[0]) return;
			var win = $(".b1"),
				width = win.width(),
				playerWidth,
				height = win.height(),
				playerHeight,
				ratio = ratio || 16/9;

			$(iframes).each(function(){
				var current = $(this);
				if (width / ratio < height) {
				playerWidth = Math.ceil(height * ratio);
				current.width(playerWidth).height(height).css({
					left: (width - playerWidth) / 2 + 10,
					top: 12
					});
				} else {
				playerHeight = Math.ceil(width / ratio);
				current.width(width).height(playerHeight).css({
					left: 0,
					top: (height - playerHeight) / 2
				});
				}
			});
		}