Hot Take - The director's commentary should not explain the canon to the viewer of it's not in the movie.
Given how everyone is stating things in the commentary like it's canon, it needs to be said. Unless implied, stated or shown in the movie, it shouldn't be canon imo. The table crab for example is never shown, but now people are talking like it's an official entity. Or how certain things work in the backrooms because Kane explains it in the commentary.
I feel like this Meta way of explaining canon is a cheap way of throwing in lore when it should have been in the movie, or a yt short. I know this is probably an unpopular opinion since he's done this since making the soundtracks. But it's quite annoying when lore information is a scavenger hunt between the songs, song titles/artwork, discord and args outside of the movie and series.