That could've gone so very wrong at so many points. Why didn't the white car let him pass, as he was clearly quicker? Or if they were filming it for the footage, then he was miles too close to the white car just about all the way through. They were almost bullying the slower cars out of the way and sitting right up their backsides, which IMHO isn't on at those speeds, I don't care if they knew them or not.
I'm not saying that for the most part their driving wasn't impressive, and certainly they've got a great knowledge of the place, but for me that's not big or clever to drive in that way and not only shows very little respect for other drivers, but also very little respect for the track.