Hello Marco,
just a doubt: is it correct to use the viewer (on my pc) and the host on the server? do I also need the RU server?
Yes, correct. No, you don't have to use the self-hosted server for the
Internet-ID connection, because you can connect via our public infrastructure (the default option).
the same behaviour, if i click on "audio capture" no sounds from remote pc (what I would like is to hear when someone speak into the mic)
Remote sound capture means capturing remote playback (sound produced by output devices).
More, once connected, I also tried: "other modes" - "remote camera", but I got an error, copied following:
Remote camera mode has been discontinued.