What do you see when you're on the video call?
Does your friend see his own video in his picture-in-picture?
Please note: I do not respond to requests for help via Private Message.
Some Macs with other than Intel processors can not seem to make full use of the SKYPE software. I have a client that has some Macs and it is a problem for them. Their Mac service guy has not been able to fix the issue.