Michael Leddy of Orange Crate Art came upon this archive of USA Arts programs.
From WNET, NYC's Channel 13, streaming episodes of USA Arts: Willem de Kooning! Martha Graham! Vladimir Nabokov! Charles Olson! And many more.
UPDATE: Robin Edgerton of Thirteen.org says: "This contains the
transcript of the Warhol episode segment, courtesy Kenneth Goldsmith
(the person who founded Ubuweb)."