Suggestion to improve the example

[eladalon1983]

At the moment, the example reads:

try {
  const stream = await navigator.mediaDevices.getViewportMedia();
  videoElement.srcObject = stream;
} catch (e) {
  console.log('Unable to acquire viewport capture: ' + e);
}

This is going to lead to a Hall of Mirrors effect and not be otherwise useful.
How about using a MediaRecorder instead? Or a PeerConnection? These seem more patently useful.