Excellent YouTube film channel called Eyes On Cinema. Rare film interviews and stuff. A few interesting recent Star Wars uploads...
36-Minute 1983 interview w/ Darth Vader actor David Prowse on 'Star Wars' & more [audio]
George Lucas in 6 Vintage Japanese 'Star Wars' Commercials for Panasonic
17-Minute 1977 'Star Wars' interviews w/ producer Gary Kurtz, Mark Hamill & Carrie Fisher