public function setVideoRating($ratingValue)
    {
        if ($ratingValue < 1 || $ratingValue > 5) {
            require_once 'Zend/Gdata/App/InvalidArgumentException.php';
            throw new Zend_Gdata_App_InvalidArgumentException(
                'Rating for video entry must be between 1 and 5 inclusive.');
        }

         require_once 'Zend/Gdata/Extension/Rating.php';
         $rating = new Zend_Gdata_Extension_Rating(null, 1, 5, null,
            $ratingValue);
        $this->setRating($rating);
        return $this;
    }