$videoal = (isset($_GET['video']) && $_GET['video'] !='' ) ? intval($_GET['video']) : '';
if(!$videoal) header('location: index.php');

if(2<=$videoal && $videoal<=10)
$videoal2 = veri1;
elseif(10<$videoal && $videoal<=20)
$videoal2 = veri2;