Youtube Internet Search - Download Video within Page

youtube.js

// Run from the dev tools console of any Youtube video
// Accurate as of June 12, 2016
var videoUrls = {};

ytplayer.config.args.url_encoded_fmt_stream_map.split(',').forEach(function (item) {
  var obj = {};

  item.split('&').forEach(function (param) {
    param = param.split('=');
    obj[param[0]] = decodeURIComponent(param[1]);
  });

  videoUrls[obj.quality] = obj;
});

console.log(videoUrls);