webm random indexer

<html>
<head>
<?php

// RANDOM VIDEO

$dir = "webm";
$dh = opendir($dir);
while (false !== ($filename = readdir($dh))) {
    $files[] = $filename;
}

sort($files);

$randomvideo = rand(2, sizeof($files)-1);

?>
</head>
<body>
<div align="center">
<h1>Random Video</h1>
<h2>Current video: <a href=/webm/<?php echo($files[$randomvideo]); ?> > <?php echo($files[$randomvideo]); ?> </a></h2>
<h3>Total videos: <a href=/webm/> <?php echo(sizeof($files)-2); ?> </a></h3>

<video style="background-color: black;"width="80%" height="70%" controls autoplay>
  <source src="webm/<?php echo($files[$randomvideo]); ?>" type="video/webm">
Your browser does not support the video tag.
</video>

<p></p>

<form action="" method="post">
<input type="submit" value="Random video!">

<p></p>
</br>
</form>
</div>
</body>
</html>