code: 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);
  	  }
docs: Match tracks based on languages and get the first