zig Tryit Editor

<!DOCTYPE html>
<html lang="zh" class="svg no-js">
<meta http-equiv="content-type" content="text/html;charset=UTF-8" />
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="../../maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
  <script src="../../ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script>
  <script src="../../maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
  <h2>Responsive Embed</h2>
  <p>Create a responsive video and scale it nicely to the parent element with an 16:9 aspect ratio</p>
  <div class="embed-responsive embed-responsive-16by9">
    <iframe class="embed-responsive-item" src="https://www.youtube.com/embed/tgbNymZ7vqY"></iframe>
  </div>
</div>
</body>

</html>