The producer of this fantastic video put a lot of work into the 3D model! Every detail that are often left out is actually put into this. And I don't know how else to describe the construction simulation part of it... the producer/animator/director decided to start from furniture and fixtures and then work its way out to walls and roofs. Interesting approach. The other noticeable thing is that everything is shot in monochrome! You wouldn't know it though with all the details that was modeled. The method of this particular shading is ambient occlusion shading. Great technique and camera paths, inspiring work.