baybal2 could probably answer better (I think he's from the Far East), but not everyone had access to mass housing - especially in rural villages like the one in the video.
On top of that, in the older USSR days, there was an internal passport system (which the modern version of the Chinese Hukou is based on) that made it difficult to move internally. This meant if you and your family decided to migrate to the city because collective farming life sucked without permission, you wouldn't be eligible for urban benefits like a Brezhnevka.
This is a major reason why Putin has historically been so popular among rural and poorer Russians - they saw their QoL increase drastically over the past 30 years, but those who were urban, intelligentsia, or skilled workers by the 1970s-80s saw their QoL drop drastically in the 90s and 2000s.
This only makes the current war that started in 2014 even dumber, because Russia was right on the precipice of becoming a "Developed Country" (WB Advanced Economy and HDI above 0.850) before it initiated the 2014 war and was subsequently sanctioned.