1)
I am rather impressed by how thoroughly all the cables involved in the cams are removed from sight. Surely every cam needs a power cable and probably a data cable too (or by wi-fi). Almost nowhere is there any cable visible. The same goes for power plugs.
Not only does that mean an excellent job of the electricians/carpenters team behind RLC :-) but it is also a sign of a long term investment in every apartment. It is not a quick job of installing some cheap webcams with an usb-cable.
2)
Would I be correct by assuming that every apartment needs a small network server to channel all the data to the central RLC servers? Somewhere out of view of the cams, of course, probably in a cupboard.