I was watching a programme about the 1975 F1 season yesterday and it was highlighted that even in 1975 the teams had never really paid much attention to pit-stops or even practiced them. They said that the one exception was Ferrari, who had realised from their sports-car racing experience that pit-stops were becoming more important and could be the difference between winning and coming 2nd.
Well, that was an Indy pit stop, not a F1 one. GPs had very few pit stop then; cars carried enough fuel for the whole race, and tyres could go the distance. I think it's Brabham who reintroduced the refuelling under Gordon Murray, and tyre change came soon after. The idea was to start with a lighter car, build a gap and refuel to finish. The car therefore never racing under full weight. That advantage came to nothing once the rest of the field adopted it.
Great clip, thanks for sharing. The driver looks like he had the time to come out of the car, grab a coffee, and head back to the car after they changed both tyres.