Asi se hace.
Código PHP:
$fehca=date('d,m,Y');
mysql_query("insert into vidinfo(title,length,depo,kewl,uplo, hora) values ('$title','$length','$depo','$kewl','$uplo','','$fehca')", $conexion) or
die("SELECT problems ".mysql_error());
mysql_close($conexion);
echo "Video Submitted.";