Back in the olden days, you just tied your cameraman right to the car:
Looks almost as goofy as Google Glass. Legendary F1 driver Jackie Stewart wore this stills-only proto-GoPro at the Monaco Grand Prix in 1966 (though not during the actual race):
Stewart ended up winning that race. I believe Stewart is also the model for this contraption, which looks like a film camera counterbalanced with a battery pack?
That couldn't have been comfortable. For some reason, neither of Stewart's helmet cams are recognized by Wikipedia as being the first documented helmet cam, which is instead attributed to a motorcycle race in 1986: