BKWLD video background-size: cover effect

video-scaling.js

// Depends on jQuery
// Assumes outerDiv and videoTag are jQuery objects

var width = outerDiv.width();
var height = outerDiv.height();
var aspectW = 16;
var aspectH = 9;
var scaleX = width / aspectW;
var scaleY = height / aspectH;
var scale = Math.max(scaleX, scaleY);
var w = Math.ceil(aspectW * scale);
var h = Math.ceil(aspectH * scale);
var x = 0;
var y = 0;
if (w > width) x = -(w - width) * 0.5;
if (h > height) y = -(h - height) * 0.5;

videoTag.css({
  width: w,
  height: h,
  top: y,
  left: x
});