Designing sound for Star Wars
You can see three great minutes of sound designer master Ben Burtt showcasing some of the source material he used the layering of a sound for Star Wars. The video is a part of a rare documentary about John Williams and the music of Star Wars published between 1989-1990.
This is part 3 of a rare documentary made juring the Making of the Empire Strikes Back between 1979-1980. If you consider this the best of the Star Wars films and love the score then this is the holy Grail of documentaries.