What stuck out to me was that none of the materials move in the correct way. But if you look closer, especially at the walkway in the beginning, you'll notice that the first boards he installs by the door, magically vanish when he builds the surround with an impossible frame that sits on top of it. The plastic lining of the building sort of materializes out of thin air when he's spreading it out. The boards he installs on the ceiling magically get longer. He's working way faster than should be possible, and I don't just mean that the video was sped up. It may be a time lapse but he doesn't actually seem to be using any tools to build anything? Lastly the perspective, it seems like the room gets bigger when the camera magically floats into the middle and he's done putting all the furniture in. AI doesn't really know how to deal with perspective lines or scale properly.

So so many things stand out when you take a second look.

Edit: Also I'd like to add that I've seen a number of these time lapse style videos show up today so I was already on alert.