Super old video! That's a BMW Motorsport 320i STW, powered by a S42 (n/a 4cyl making close to 300hp) and a 7-speed gearbox. That race he started in the back of the pack, most likely due to qualifying issues, that explains how fast he was moving through the pack. If memory serves me right it's a GT1 car, towards the end he starts catching up with other cars in his class .
There are versions of this vid with the car info at the beginning floating around the net.