<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<audio controls src="1.mp3"></audio>
<video controls src="1.mp4"></video>
<audio src=""></audio>
<video src=""></video>
</body>
</html>