Wow the revised video has a lot of improvement! Didn’t expect the elevator, that looks like fun.
My layman critique:
I like the checkerbox pattern, it seems in the revised video you covered up portions of it with the bookcases which I think is good thing for adding more variety to the visual composition. I would try to add even more fixtures like hanged paintings / candle/lanterns on the walls?
But at 0:11 I feel there the lighthouse/portal structure’s walls could use an extra pattern to segment the checkerbox material. But considering the way you’ve improved the level I’m sure most of these things will be addressed!