Anatomy of a Song (1976) is a half hour documentary (part two here) about Stephen Sondheim's song Someone in a Tree, from the musical Pacific Overtures. Sondheim talks about the challenges and thought processes behind what he calls his favourite of his own songs. See the original 1976 show in full here. Also see this earlier post on the same song.
"Someone in a Tree" -- an incedibly rare video from the original, 1976 production of "Pacific Overtures." I grew up listening to an L.P. of these same people perform this same song, but I've never before seen them perform it. I grew up in Southern Indiana, so actually seeing a Broadway show was out of the question. But I loved this song, and -- years later -- I read that it was Stephen Sondheim's favorite of all the songs he ever wrote. Today, I found this video on YouTube and it was like finally seeing someone after being blind for years. I still have chills running up and down my spine. Also: Sondheim forum, online journal, and various gems (and bombs) on youtube -- including the man himself teaching a master class and this 12-year-old's spirited performance!