Get link Youtube

<?php
Class YoutbeDownloader
{
    private static $endpoint = "http://www.youtube.com/get_video_info";
    public static function getInstance()
    {
        static $instance = null;
        if (null === $instance) {
            $instance = new static();
        }
        return $instance;
    }
    public function getLink($id)
    {
        preg_match('#https://www.youtube.com/watch\?v=(.*)#', $id, $Match);
        $API_URL                    = self::$endpoint . "?&video_id=" . $Match[1];
        $video_info                 = $this->curlGet($API_URL);
        $url_encoded_fmt_stream_map = '';
        parse_str($video_info);
        if (isset($reason)) {
            return $reason;
        }
        if (isset($url_encoded_fmt_stream_map)) {
            $my_formats_array = explode(',', $url_encoded_fmt_stream_map);
        } else {
            return 'No encoded format stream found.';
        }
        if (count($my_formats_array) == 0) {
            return 'No format stream map found - was the video id correct?';
        }
        $avail_formats[] = '';
        $i               = 0;
        $ipbits          = $ip = $itag = $sig = $quality = $type = $url = '';
        $expire          = time();
        foreach ($my_formats_array as $format) {
            parse_str($format);
            $avail_formats[$i]['itag']    = $itag;
            $avail_formats[$i]['quality'] = $quality;
            $type                         = explode(';', $type);
            $avail_formats[$i]['type']    = $type[0];
            $avail_formats[$i]['url']     = urldecode($url) . '&signature=' . $sig;
            parse_str(urldecode($url));
            $avail_formats[$i]['expires'] = date("G:i:s T", $expire);
            $avail_formats[$i]['ipbits']  = $ipbits;
            $avail_formats[$i]['ip']      = $ip;
            $i++;
        }
        if (is_string($avail_formats)) {
            echo $avail_formats;
        } else {
            foreach ($avail_formats as $video) {
                if (strpos($video['url'], 'itag=22')) {
                    $m22 = $video['url'];
                } elseif (strpos($video['url'], 'itag=18')) {
                    $m18 = $video['url'];
                }
            }
            if (isset($m22, $m18)) {
                $js = '<source data-res="720" src="' . $m22 . '" type="video/mp4" />
                        <source data-res="360" src="' . $m18 . '" type="video/mp4" />';
            } elseif (isset($m18)) {
                $js = '<source data-res="360" src="' . $m18 . '" type="video/mp4" />';
            } else {
                $js = 'Not support';
            }
            return $js;
        }
    }
    function curlGet($URL)
    {
        $ch      = curl_init();
        $timeout = 3;
        curl_setopt($ch, CURLOPT_URL, $URL);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
        $tmp = curl_exec($ch);
        curl_close($ch);
        return $tmp;
    }
}
?>