Function to get video file from youtube

function getVideoUrlAction( $id = null,$quality='high' ){

        $return = array();

        $quality_index = array('high'=>0,'medium'=>0,'small'=>0);

        $videoID = empty( $id ) ? ( $this->getRequest()->getParam('videoid') ) : $id ;

        $xmlReqURL = 'http://www.youtube.com/get_video_info?&video_id='.$videoID.'&asv=3&el=detailpage&hl=en_US';

        $response = file_get_contents( $xmlReqURL );

        parse_str($response,$ttt);

        if($ttt['status']=='fail')return 'Invalid video ID';

        $each_quality_urls = explode(',',$ttt['url_encoded_fmt_stream_map']);

        $each_quality_array = array();

        foreach ($each_quality_urls as $key => $value) {
            parse_str($value,$item);
            if( strpos( $item['type'], 'video/mp4' ) !== false && $item['quality']=='hd720')
            {
                $quality_index['high']=$key;
            }
            else if( strpos( $item['type'], 'video/mp4' ) !== false && $item['quality']=='medium')
            {
                $quality_index['medium']=$key;
            }
            else if($item['quality']=='small')
            {
                $quality_index['small']=$key;
            }
            
            $item['url'] = urldecode($item['url']).'&signature=';
            $item['poster'] = "https://img.youtube.com/vi/{$id}/hqdefault.jpg";
            array_push($each_quality_array,$item);
        }

        if($quality=='high')
            return $each_quality_array[$quality_index['high']];
        else if($quality=='medium')
            return $each_quality_array[$quality_index['medium']];
        else if($quality=='small')
            return $each_quality_array[$quality_index['small']];
    }