This is Audi R8 #605 at Laguna Seca with Tom Kristensen onboard:
https://www.youtube.com/watch?v=ZK5u3aCwNgc&t=136s
And a tech video:
https://www.youtube.com/watch?v=eIcalCMUbD4
I have to admit that aside from some details, I'm still slightly surprised at how advanced this thing actually is. And that's given that it was designed in 1999 and last raced competitively in 2006.
Also, Laguna Seca has changed fairly little since 2005, too.