1) Your video should have automatically started in the window below. If it doesn't start, please close all other browser windows and video chat programs and refresh the page.
2) To test your microphone, you should be able to see the volume level in the bar below when you speak. If you can't see anything make sure that you don't have any headphones or other bluetooth devices connected.
3) To test your speakers, play the sound below. If you can't hear it, make sure that your volume is turned up and that you don't have any headphones or bluetooth devices connected.