Hi Raphael,
I’m afraid I cannot really help you. We’ve never tried running OpenVidu in Raspberry Pi. There could be a lot going on. In theory OpenVidu should work fine in any modern Linux distribution supporting a modern version of docker and docker-compose, but this corner cases can introduce not very well-known problems.
Besides that, be aware that OpenVidu needs a minimum set of requirements that Raspberries may not fulfil.
If you are able to advance this task, please keep us informed!
Cheers.