Looks like driver error to me, he runs the car without the rear spoiler and has less downforce on the rear wheels and is properly going on the dirtiest part of the road and turns the car in way to quickly, the car looses traction at the rear wheels due to a combination of dirty road and to little downforce. If he had driven the car in a straighter line and slowly sliding the car right just by a few degrees he would probably not loose it as he did....IMHO..