optimize memory consumption when downloading files

      header('Content-Transfer-Encoding: binary;');

      header('Content-Length: ' . filesize($video["video_path"]).';');

      flush();

      readfile($video["video_path"]);

	  //We now push by block of 10M to save memory consumption of readfile

      //readfile($video["video_path"]);

      $fd = fopen($video["video_path"], 'rb');

      while (!feof($fd)) {

         $buf = fread($fd, 10485760);

         echo $buf;

      }

      fclose($fd);

    }

    else {

      header("Status: 404 Not Found");