This is a gem of a find. This is 50 minute documentary from the 80's all about ILM (Industrial Light And Magic). The British documentary called Horizon (that is still going today) goes into a lot of detail especially focusing on Return Of The Jedi and Indiana Jones. This is a must see for all ILM and Star Wars fans alike. It was shown on BBC2 and called How To Film The Impossible.
Part 2 Part 3 Part 4 Part 5