This is a tricky one. It sounds like the units have walls in common, which can be problematic for lots of reasons.
Possible, but were there complaints of adjoining fart manefestation, cooking odor manefestation, pot smoke, whatever? No.
looking at the video looks like this was a condo conversion from apts to condos. Apt walls are very thin
Which is why I'd never live in an apartment if I can avoid it - college dorms were bad enough.