BIM-Resource/script/php/video/index.php

<?php

/**
 * index.php - The Entry File
 **/

// Start the session
session_start();
// It is really important to regenerate id on every click...
session_regenerate_id();

// We will tell the next file that we have a token set using session
$_SSEION['setToken'] = true;

// The filename... You can get that from a $_GET variable and store it here
$token = "./test.mp4";

// We will be encrypting the video name using session id as key ans AES128 as the algorithm
$token_encrypted = openssl_encrypt($token, "aes128", session_id(), 0, '1234567812345678');

?>

<video controls controlslist="nodownload">
    <source src="./video.php?vid=<?php echo $token_encrypted; ?>">
    </source>
</video>