ync custom-element="amp-experiment" src="https://cdn.ampproject.org/v0/amp-experiment-0.1.js"></script>
  <script async custom-template="amp-mustache" src="https://cdn.ampproject.org/v0/amp-mustache-0.1.js"></script>
  <style amp-custom>
    h1 {
      margin: 16px;
    }
  </style>
</head>
<body>
  <!-- Basic test -->
  <amp-img width=360 height=200 layout=responsive src="bball.jpg"></amp-img></amp-img>

  <!-- Poster test -->
  <amp-video id="intro-vid" src="./media/cover.mp4" layout= "fill" poster="bball