In reply to gjh1978: where leo and jeremy started from in the film is a little crag at the top of the gorge called 'miroir du Fou'. Don't know what route he did on it, but a did an easy one on the left.
It's really the only place in the gorge where the road meets the bottom of a route. So they could get footage of leo running to the bottom of the route, and jeremy jumping in the car.
Don't know what the big main route was that he did.