Can't see the video.

I never personally met that phenomenon in real life and pretty sure that there are no kommunalkas in my provincial town of 300 000 (well, there are student's hostels organized in that way but it is temporary). I know that this kind of residence organization was widespread from the beginning to the middle of 20th century when many people in USSR moved from countryside to big cities but I am not sure if some of them still exist and used as a permanent residence by families.