Wait for the red (x) in the field to move away.

Click on the stream to activate fullscreen and sound


Maby?

Click more time on  (Click here to unmute) for option arrow/sound .

Remove all tabs and by  PDF on browser click on. (x).

Popup image: At the stream of schedule.

You will see this in the stream.

Click on that and then double click on that popup window for full screen.



If stop the stream during 20-30 sec, press the REFRESH button