PHP page generator

I wanted to do more or less like Youtube, where you fill out the form and then a page with your video is created (my site will also contain videos), I already did the part of the upload but I have no idea where start to generate a page automatically. Could you tell me a programming language for this or if I can do it for php itself?

Upload:

<?php
    include("conexao.php");

    $msg = false;

    if(isset($_FILES['arquivo'])){

        $extensao = strtolower(substr($_FILES['arquivo']['name'], -4));
        $novo_nome = md5(time()) .$extensao;
        $diretorio = "upload/";


        move_uploaded_file($_FILES['arquivo']['tmp_name'], $diretorio.$novo_nome);

        $sql_code = "INSERT INTO arquivo (codigo, arquivo, data) VALUES (null, '$novo_nome', NOW())";
        if ($mysqli->query($sql_code))
            $msg = "Arquivo enviado";

        else 
            $msg = "Falha ao enviar.";

    }
?>

<?php
    if ($msg != false) echo "<p> $msg </p>";
?>

<form action="upload.php" method="POST" enctype="multipart/form-data">
    Arquivo: <input type="file"  required name="arquivo">
    <input type="submit" name="Salvar">
</form>