The Facility GE:S has right now is really dirty and broken to the point it seems they just don't care about the place. In the movie it was grungy, but far from what it is right now in GE:S, and it wasn't broken.
The one on that video is dirty enough, but the problem is that the walls look like plastic and missed some details that were on the movie, maybe if he changed the walls to concrete and work a bit on the floor texture, it'd look much better and like in the movie but probably he wanted to keep that N64 feel. Also probably not enough time since it's a school project.
Also, the stairs and railings are closer to the movie than the ones in GE:S.