I had never seen this footage before, and have to admit, I was pretty excited watching it.
It is a 1978 Event where they took out 20 year old F1 cars for a demonstration race. Fangio says he is not demonstrating, he is racing. Brabham seems to be in the same mindset. What we get is 4 very exciting laps as vintage F1 cars drive at the limits. It was amazing to see Fangio push what should have been a slower car so hard to keep up with a more modern one.
Enjoy.
https://www.youtube.com/watch?v=cVggt1fv34c (https://www.youtube.com/watch?v=cVggt1fv34c)
Also relevant.. Jack Brabham raced for John Cooper in the early days of F1 before forming his own team.
Every time I go to watch this I get interrupted. I've gotten 1 lap in!
Enjoyed that. Would have loved to see a couple more laps.