Nanny cams always remind me of Malcolm in the Middle. I don't think they are very used in my countries, but I see the importance of having them. To have 1080p is good, this way you can see all the details easily and you could even distinguish someone's face more easily.

My brother rents an Airbnb unit and I think something like this will be very usefeul, He already has security cameras, but I think they do not record sound.