I saw an old video of the diver who directed the underwater scenes in “Thunderball” and “Never Say Never Again”. He said the underwater filming and the devices, many of which had to be invented, was extremely difficult.
He also was the monster in “Creature From the Black Lagoon”. He is my BIL’s cousin, they both grew up in Jensen Beach. His name is Ricou Browning.
It made me realize that all that underwater stuff is a bit harder than it looks like.
Go-Pros in waterproof housings have made it possible to record all kinds of crazy u/w stuff.