When I had that issue with Firefox 125.0.3 yesterday afternoon I tried the old version 125.0.2 and also a different webrowser. Both played odysee just fine. So it couldn't have been some network problem. Restarting 125.0.3 or disabling add-ons didn't help either. But later in the evening odysee started working with Firefox 125.0.3. I'm puzzled too. Maybe a CDN glitch?