I cannot find a previous thread on this, so please excuse me if I haven't searched well enough.
I am currently writing a dossier on the Prophet Can-Am car, and I've been told by a previous owner that the Laguna Seca race on 14 Oct 1979 that Bobby Rahal won in the Prophet was one of the first times an in-car camera was used in a live TV transmission. When I googled this, I found a claim that such a camera was used at Bathurst in 1979, presumably the 1979 Hardie-Ferodo 1000 which was held on 30 Sep 1979, just two weeks earlier, but it is unclear whether that footage was used live.
There are earlier examples of in-car footage of course, notably from F1 in 1966, but not (necessarily) from an actual competitor, and not (necessarily) used live.
Can anyone confirm any of this?