<?php
$url  =  explode("?v=",$_REQUEST['v'])[1]   ;
if ( !preg_match("/^[-_a-zA-Z0-9.]+$/", $url) )
die() ;
$shhl =  'youtube-dl -q --ffmpeg-location /usr/local/sbin/ffmpeg --write-auto-sub --embed-subs --convert-subs ass --merge-output-format mkv -o \'%(title)s.%(ext)s\' '.$url.' --audio-format opus --audio-quality 48k -f " bestvideo[ext=webm][height <=? 360 ]+worstaudio[ext=webm]/bestvideo[ext=mp4][height <=? 480 ]+worstaudio[ext=webm]" --external-downloader axel --external-downloader-args " -U \'Mozilla\' -n 7 " --restrict-filenames  2>/dev/null >/dev/null &  ' ;
 shell_exec( $shhl  ) ;
header( 'Location: '. $url )  ;   exit () ;
?>