Sorry but I’ll have to correct you there. The webcam (even the ones embedded to laptop screen frames) are a mere usb device, using four wires in total: 2 for power and 2 for serial comms. The device doesn’t get “powered on or off”. There’s a controller chip that handles everything, from the simple usb serial comms to image processing. What I was referring to is that, in the past, there was a pin on that chip which would go high indicating the chip was “called”, as in it had come out of standby. This pin was not software dependent and could not be changed. Manufacturers would use this enabled pin to control the led (amongst other things) but these days they don’t. Mostly because these pins get repurposed depending on the application and so it’s cheaper to use software to configure them with new functions instead of having pins that only carry out a single function. In theory is a smarter way to utilise chips in multiple products but by ignoring true customer privacy.