https://www.lego.com/en-us/themes/technic/bugatti-chiron/med... has a link to a "How We Did It" video. There are clips of the chassis and some of the parts that weren't Lego. It shouldn't detract from the feat; the motor is a matrix of Technic motors, the door hinges are Technic pieces, and the skin was adjustable with a tool that also was made of Technic parts.