Here are two clips involving John Cale, first a beautiful orchestral version of "Paris 1919" performed live in Amsterdam.
Second, a true rarity. This is Cale appearing on the game show "I've Got A Secret" in 1963 long before Andy Warhol or Lou Reed entered his life. The secret here is that he was part of a rare full length 18 hour performance of Erik Satie's "Vexations". After the panel does their guessing he then plays one run through of the piece on piano. Never mind that there's some snickering in the audience. Can you imagine any major network TV show today so much as mentioning Erik Satie much less letting somebody perform his music?