I live in Tokyo. These apartments (9m^2) are definitely not the norm, a typical tiny apartment is 20m^2 and a typical university dorm room for 1 person is 15m^2. They are just a bit more choice on the new/close/small, old/far/larger list of housing options; they are not a widespread trend. Also, the old/far/larger options are in livable neighborhoods with good public transit. Transit is usually paid by your employer, so it makes sense that the people in the video have non-traditional jobs without that perk. Roommates are not a popular option, but other than that I find Tokyo to be quite good for low end apartment options compared to say Vancouver (do you want a close moldy basement suite with a roommate or a far moldy basement suite and car dependency?).