Better views here: ROBOT CAR BMW 3 Series - Transformer FOR REAL! - YouTube
This second video quotes a build time of 8 months.
I sure hope this guy has amazing model building skills and a large budget. (At first I thought it was all CGI but some views in the second video seem to show internal mechanisms.) I think one of the hardest parts will be lifting the front 2/3 of the car without toppling forward. I suspect there is a LOT of "junk in the trunk". 