index.html

<!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>Picture in Picture</title>
    <link rel="icon" type="image/png" href="https://www.google.com/s2/u/0/favicons?domain=css-tricks.com">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css" integrity="sha512-9usAa10IRO0HhonpyAIVpjrylPvoDwiPUiKdWk5t3PyolY1cOd4DSE0Ga+ri4AuTroPR5aQvXU9xC6qOPnzFeg==" crossorigin="anonymous" referrerpolicy="no-referrer" >
    <link rel="stylesheet" href="style.css">
</head>
<body>

    <!-- VIDEO -->
    <video id="video" controls height="360" width="640" hidden></video>

    <!-- BUTTON -->
   <div class="button-container">
      <button id="buttons">START</button>
   </div>
   
    <!--SCRIPT-->
    <script src="script.js"></script>
   
</body>
</html>