I don't know if you are trolling or you are saying It for sure...
Are you hearing how much gas is he using? where is he braking?
Pay attention in the moments he push in corners how he has to correct, or how he has to correct when he brakes more agressively (and even in that moments he is driving really in "safe mode" trying to not to slide).
I tested today in Brianza and It's possible to push little more before begining to slide. You only have to balance the car, and be smooth like the guy in that video. Brianza is not the better example, but two corners are in 2nd gear, I will try better in other track tomorrow!