autoplay_iframe.html | Explore in Territory

<html>
<head>
<title>Autoplay Test Page</title>
</head>
<body>
<iframe id=subframe></iframe>
<video id=video>
  <source src=bigbuck.webm type=video/webm />
</video>
<script>
function tryPlayback() {
  const video = document.getElementById('video');
  return video.play().then(() => {
    return true;
  }, (e) => {
    return e.name != 'NotAllowedError';
  });
}
</script>
</body>
</html>

chromium/chrome/test/data/media/autoplay_iframe.html