public function getSpriteWebvttForEpisode($episode, $player_type = "jwplayer")
    {
        $this->calculateInterval($episode);
        switch ($player_type) {
            case 'jwplayer':
                return $this->getSpriteWebvttForJwPlayer($episode);
                break;

            default:
                return $this->getSpriteWebvttForJwPlayer($episode);
                break;
        }
    }