PHP Youtube MP4 Dönüştürme Fonksiyonu

<?php  
  function _MP4DONUSTUR($_YTID){
    $_vCOV = file_get_contents("http://keepvid.com/?url=https://www.youtube.com/watch?v=".$_YTID);
      preg_match_all('#<br clear="both" /><br /></div>(.*?)</div>#Ssie',$_vCOV,$_MP4);
      preg_match_all('#<a href="(.*?)"#Ssie',$_MP4[1][0],$_getMP4);
    $_MP4URL  =  strip_tags(trim($_getMP4[1][0]));
    
    return $_MP4URL;
  }
  
  echo _MP4DONUSTUR('Youtube Video ID');
  
  /* Webinyo.COM */
?>