If studios weren't incredibly anal about leaks and spoilers, we might be seeing a whole lot of videos like this on the web. David Berry worked as a rotoscope and animation artist for six months on Star Wars, shooting home movies when time allowed. He's put up a nostalgic compilation of some of those set to music, and it's a fun look back at the behind-the-scenes of George Lucas' space romp in the mid-70s when facial hair was common among men, and bras were not among women.
As one of the commenters points out, it's strange (and awesome) to see a workshop without a computer in sight, and to watch people working on things like a model of the Millennium Falcon or starfields by hand. Berry went on to work at Industrial Light and Magic on films like Close Encounters of the Third Kind, The Empire Strikes Back, Star Trek II: The Wrath of Khan, Raiders of the Lost Ark and winning an Oscar for work on Cocoon. Not too shabby. He now dabbles in time lapse photography and has graciously shared this Star Wars footage with the web.
Hopefully, as NDAs expire and time passes, we'll see all sorts of footage from people shot on the sets of different films.