public function getVideoWatchPageUrl()
    {
        $this->ensureMediaGroupIsNotNull();
        if ($this->getMediaGroup()->getPlayer() != null &&
             array_key_exists(0, $this->getMediaGroup()->getPlayer())) {
            $players = $this->getMediaGroup()->getPlayer();
            return $players[0]->getUrl();
        } else {
            return null;
        }
    }