<h3>MUZIC</h3>
<form action="" method="post">
<input type="url" name="url" />
<button>Play</button>
</form>
<?php
$videoUrl = "";
if(isset($_POST['url'])){
	$videoUrl = $_POST['url'];
}
?>

<video width="720" height="500" controls>
	<source src="<?php echo $videoUrl; ?>" >
</video>