Match tracks based on languages and get the first
function findTrack(languages) {
	    var _this3 = this;

	    var force = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
	    var tracks = captions.getTracks.call(this);

	    var sortIsDefault = function sortIsDefault(track) {
	      return Number((_this3.captions.meta.get(track) || {}).default);
	    };

	    var sorted = Array.from(tracks).sort(function (a, b) {
	      return sortIsDefault(b) - sortIsDefault(a);
	    });
	    var track;
	    languages.every(function (language) {
	      track = sorted.find(function (track) {
	        return track.language === language;
	      });
	      return !track; // Break iteration if there is a match
	    }); // If no match is found but is required, get first

	    return track || (force ? sorted[0] : undefined);
	  }