I have also seen a 90 minute version of this documentary, which was shown on the brilliant Biography channel. Although I had doubts about buying the soon to be released trilogy on DVD, the documentary has certainly whetted my appetite, and made me eager to see the complete version which will be included on the fourth disc of the set. Even for someone as knowledge about the Star Wars movies and George Lucas as I am, it was still very entertaining, and contained quite a few never before seen out-takes from all the films. The programme features the problems that Lucas had with 20th Century Fox execs (apart from Alan Ladd jnr, who greenlit Star Wars) when the movie ran over budget and missed it's Christmas 1976 opening date, the '...hippies...' at ILM who hadn't completed any decent effects shots Lucas could use, and the destruction of sets in Tunisia which halted filming temporarily. There are also interviews with most of the original cast members - even Harrison Ford who certainly doesn't enjoy doing them, which is no big secret.
These edited highlights I've described, have left me hankering for more.
These edited highlights I've described, have left me hankering for more.