> it's highly unlikely that anyone's full-time job consists solely of watching the one camera that happens to point towards you.
Until you start behaving "suspiciously", that is. Not long ago there was a Dutch documentary about advances in surveillance camera technology and the privacy implications thereof. They then demonstrated how they could follow somebody walking through town by switching from camera to camera. All from a control room with a hundred video monitors. Downright Orwellian. So yes, there are people controlling these cameras full time from these control rooms and they're actively monitoring everybody.
They also follow people with cameras like in the OP but the reaction is wildly different. People shockingly seem to be mostly OK with it.