OK, so no takers yet. How about this? I was looking here Fixing Camera Error on Mac OS. Rebooting does nothing. Under the heading: Force quit AppleCameraAssistant and VDCAssistant it uses terminal. I have been cautioned about terminal use here, so what do you think? Should I try it?
MacBook Pro - M2, Ventura 13.6 Safari Tech Prev 17.0 Safari 16.6 Firefox 116.0.2 iPhone 7 Version 15.8