public function getFormUploadToken($videoEntry,
        $url='https://gdata.youtube.com/action/GetUploadToken')
    {
        if ($url != null && is_string($url)) {
            // $response is a Zend_Http_response object
            $response = $this->post($videoEntry, $url);
            return self::parseFormUploadTokenResponse($response->getBody());
        } else {
            require_once 'Zend/Gdata/App/Exception.php';
            throw new Zend_Gdata_App_Exception(
                'Url must be provided as a string URL');
        }
    }