Dúvida com código

<?php
error_reporting(0);

$id = $_GET["id"];

// Módulo de extraxión para usar Video.js
$conexion = curl_init("http://xvideos.com/video". $id ."/");
curl_setopt($conexion, CURLOPT_USERAGENT, "Mozilla/5.0 (Linux; U; Android 4.0.3; ko-kr; LG-L160L Build/IML74K) AppleWebkit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30");
curl_setopt($conexion, CURLOPT_HTTPHEADER, array("Accept-Language: es-es,en"));
curl_setopt($conexion, CURLOPT_POSTREDIR, 3);
curl_setopt($conexion, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($conexion, CURLOPT_RETURNTRANSFER, TRUE);
$respuesta = curl_exec($conexion);
curl_close($conexion);

$url3GP = "";
$urlMP4 = "";
$urlJPG = "";

if(preg_match('|html5player.setVideoUrlLow\(\'(.*?)\'\);|is', $respuesta, $low)){
    $url3GP = $low[1];
}
if(preg_match('|html5player.setVideoUrlHigh\(\'(.*?)\'\);|is', $respuesta, $high)){
    $urlMP4 = $high[1];
}
if(preg_match('|html5player.setThumbUrl\(\'(.*?)\'\);|is', $respuesta, $thumb)){
    $urlJPG = $thumb[1];
}

if($urlMP4 == ""){
    $urlMP4 = $url3GP;
}
?>

<link href="/video/video-js.css" rel="stylesheet">
<script src="/video/ie8/videojs-ie8.min.js"></script>
<video id="my-video" class="video-js" controls preload="auto" width="640" height="264"
poster="<?php echo ($urlJPG); ?>" data-setup="{}">
<source src="<?php echo($urlMP4); ?>" type='video/mp4'>
</video>
<script src="/video/video.js"></script>

<script>
	logged_user = false;
	var html5player = new HTML5Player('html5video', '23671476');
	html5player.setVideoTitle('Despierto a mi novia con mi pene - Girlssexycam.com');
	html5player.setSponsors(false);
	[COLOR="#008000"]html5player.setVideoUrlLow('http://porn.im.bb927400.23671476.x.xvideos.com/videos/3gp/f/d/7/xvideos.com_fd7f8cf9d698bb3a057df4e72016c39a.mp4?e=1474719030&ri=1024&rs=85&h=7565c700e9f4b6e2f2b98096af4c8fc2');[/COLOR]
	[COLOR="#008000"]html5player.setVideoUrlHigh('http://porn.im.bb927400.23671476.x.xvideos.com/videos/mp4/f/d/7/xvideos.com_fd7f8cf9d698bb3a057df4e72016c39a.mp4?e=1474719030&ri=1024&rs=85&h=11104873c8a8b1e3dfe367244c7a1b83');[/COLOR]
	[COLOR="#FF0000"]html5player.setVideoHLS('http://porn.im.bb927400.23671476.hlsint.x.xvideos.com/1474719030/106/15f0486185246a044fa8dd2dd94576cc/videos/hls/fd/7f/8c/fd7f8cf9d698bb3a057df4e72016c39a/hls.m3u8');[/COLOR]
	[COLOR="#008000"]html5player.setThumbUrl('http://img-egc.xvideos.com/videos/thumbslll/fd/7f/8c/fd7f8cf9d698bb3a057df4e72016c39a/fd7f8cf9d698bb3a057df4e72016c39a.15.jpg');[/COLOR]
	html5player.setRelated(video_related);
	html5player.setThumbSlide('http://img-egc.xvideos.com/videos/thumbs/fd/7f/8c/fd7f8cf9d698bb3a057df4e72016c39a/mozaique.jpg');
	html5player.setIdCDN('1');
	html5player.setIdCdnHLS('1');
	html5player.setFakePlayer(false);
	html5player.setDesktopiew(true);
	html5player.setVideoURL('/video23671476/despierto_a_mi_novia_con_mi_pene_-_girlssexycam.com');
	html5player.initPlayer();
	</script>

#EXTM3U
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=763904,RESOLUTION=854x480,NAME="480p"
hls-480p.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=423936,RESOLUTION=640x360,NAME="360p"
hls-360p.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=155648,RESOLUTION=444x250,NAME="250p"
hls-250p.m3u8

if(preg_match('|html5player.setVideoHLS\(\'(.*?)\'\);|is', $respuesta, $m3u8)){ 
    $urlJPG = $m3u8[1]; 
}