The video description states:
"Giving our good friend Stef who is a great writer for Blackflag Jalopnik a few hot laps in the P1. The tires were pretty shagged by this point in the day, but still some great fun was left in them. I am always thankful for the wonderful people this great sport brings into my life and the fantastic driving experiences I am allowed to have. Thanks all, J."
J here refers to Tudor United SportsCar racer Jason Hart. Hart took Stef on the ride of his life in the McLaren P1 at the Circuit of the Americas.
Stef describes the experience as follows:
"Despite the tires having less than optimal grip, this car just seemed like it was always in control. It had the kind of gentle, progressive breaking-loose that made it feel like I was in a 944 or a Miata. Sure, Hart’s a great driver who does this sort of thing for a living, but he made all of the times when the wheels spun or stepped out to one side seem infinitely controllable in an unexpected way. The P1 twitched a few times in places where I’ve seen cars lose control and eat a very expensive wall, but the car quickly regained its footing and gently clawed its way back to where it needed to point."
"In all other respects, the car was even crazier than expected. There’s a bump that’s developed just after turn 11 on the back straight where the car would go light because it was going so fast. Braking zones for the big hybrid beast were miniscule. Acceleration would shame a rocketship."