For the video conferencing to work you have to give permission to use your Camera and
Microphone.
Look for a Camera or Microphone icon on the address bar (at the top of the screen) - if you click on it you
can allow access.
- Apple iOS - Reload the page, Join again and allow access.
- Android - click the Padlock icon on the left of the address bar,
then site settings and allow access to the Camera and Microphone and then Join again.