The John Williams one is The Seville Concert... it is great, it is what inspired me to really start playing classical vs electric. On this video he plays Seville by Albeniz, Bachs Lute Prelude in E Major, Sakura Variations, Ushers Waltz by Koshkin, Asturius, Adagia fro Conierto de Aranjuez, among others. It is a famtastic video, but extremely hard to get hold of (in the US at least). I managed to get it from somone who made a DVD from the VHS. If anyone can get hold of it and hasnt seen it yet, I would highly recommend it. After the concert, it has a documentary on his life which is what i think the previous poster was refering to.
I met JW once and told him he needs to make a DVD, but all he said was he was thinking of making one focused on the history of the classical guitar. That would be awesome too!