The last video doesn't look Ukrainian to me, the title is Czech and so is the warning label above the fuses. Apart from being aluminium and usually TN-C, older Czech wiring is usually surprisingly decent, plenty of circuits and healthily-sized wires (1.5 mm2 copper/2.5 mm2 Al for 10 A lighting circuits, 2.5 Cu or 4 Al for 16 A socket circuits). A while ago I posted pictures from an 1890s flat in Prague, rewired in the 70s I guess. IIRC the 1-bedroom place (kitchen, hall, sitting room, bedroom, bathroom) had two lighting circuits, two socket circuits, even a dedicated circuit for the extractor fan in the bathroom!
By comparison, yesterday I did some work in a very similar place in Vienna, rewired in 1969 and that had two general-purpose circuits and one oven circuit - period. The oven on a 10 A Diazed fuse wasn't such a bright idea, the base was completely burned! I only replaced a few light switches, once the place is cleared out the landlord will surely have it completely rewired.
