<?php
$dizin = 'senindizinin/buklasor/';
$files = scandir('senindizinin/buklasor/');
$inArray = array(".mp4",".flv",".3gp");//uzantilarini kendin arttir
$video = array();
foreach ($files as $file) {
	if(is_file($dizin.$file)){
	    if(in_array(strrchr($file,'.'), $inArray)){
	        $video[] = $dizin.$file;
	    }
	}
}

$toplam = count($video);
if(!$toplam){
    echo 'hic video bulunamadi';
}else{
    echo $video[0]; //1. video
    //echo $video[1]; //2. video
}
?>