public static function video($mixWidth = null, $height = null)
    {

        $defParam = array(
            'width' => 560,
            'height' => 315,
            'src' => '//www.youtube.com/embed/0af00UcTO-c',
            'frameborder' => 0,
            'allowfullscreen' => 'true'
        );

        $param = array();

        if (is_integer($mixWidth)) {
            $param['width'] = $mixWidth;
        }

        if (!$height && is_integer($height)) {
            $param['height'] = $height;
        }

        $param = array_merge($defParam, $param);

        return '<iframe ' . Html::attributes($param) . '></iframe>';

    }