While reading Filmtracks I stumbled upon a discussion where these two Youtube videos from Jerry Goldsmith's The River Wild recording sessions were linked. Part of this material is seen in the old JG Film Music Masters documentary but this is, I believe the actual raw footage from various parts of the sessions from the opening tuning to recording booth discussions between JG and director Curtis Hanson. There is over an hour's worth of it in 2 parts. Fascinating stuff seeing how the scoring proceeds and how meticulous the crafting of a cue can be! Part 1
Part 2