I need your help.
I've tried all of what this guy has posted in this link, Except that, I did a clean install with Sierra, High Sierra, then now Catalina and I updated it to V.10.15.5. I have tried also plugging in a USB external webcam and it worked once after a few try and no longer working after that.
I think this might not be a hardware issue since I already plugged in an external camera and still didn't work?
I hope you can help me. I need this MacBook to work by June for my online classes. I greatly appreciate your time and wisdom on this problem. - Paz