Mark Sutton, who parachuted into the Olympic Stadium dressed as James Bond during the opening ceremony of London 2012, died after hitting a mountain ridge during the freefall from a helicopter near Mont Blanc, police believe.
Trey Cook, editor-in-chief of Epic TV, an online extreme sports media service, said Sutton was part of a group of 20 of the world's top wingsuit pilots he had invited to the Alps to jump on film.
Speaking from Chamonix, the French resort where the group are staying, he said: "There were two pilots that jumped at the same time. The pilot who was with him (Sutton) had a camera on."
He said the moment of impact was not on film.
Wingsuits are special jumpsuits which increase the surface area of the body and act like a parachute wing, allowing users to glide through the air at high speeds before landing via parachute.
Describing Mr Sutton's death as devastating, Mr Cook said all bar one of the group had decided to carry on with jumps in the area despite his death, in tribute to his memory.
"We had organised a group of 20 of the world's top wingsuit pilots to come and do some jumping," Mr Cook said. "It was a really casual event. They had gone up in helicopters and they were jumping. They were choosing their own courses. We were filming them as they were flying."
Sutton doubled for actor Daniel Craig for a section of the London Games curtain-raiser which saw the spy pretend to jump alongside the Queen with Union flag-emblazoned parachutes.