Just to jump in to Captain's defence here, I've been on a track day with him (Castle Combe), both of us, in our Zeds, and he didn't drive anything like the guy in that video. In fact he ws great with me who was a total novice and took great care to let me follow him and vice versa later on. He was also courteous to other cars and chatting to everyone in the breaks there was absolutely no hint of anyone questioning the way anyone else was driving. So to judge his driving style of the basis of a video he might like is unfairly jumping to conclusions.
Re the video itself, great to watch but I would hate to be on track with so many cars, that's the main issue. If there had been half of the amount of cars on track everyone could have given everyone else a bit more space.
And one final point, Dan massively jealous of you driving an R300 at Castle Combe! I am a bit obsessed with getting a seven at the moment so you've just made me turn (racing) green with envy. It must have been a brilliant day.