Films that that had added footage AFTER completion

See here: 2001: A Space Odyssey - #126 by Elendil_s_Heir. I see I misremembered: he cut about 12%, not 20%. And yes, I believe it’s now lost footage. I highly recommend that book, Space Odyssey: Stanley Kubrick, Arthur C. Clarke, and the Making of a Masterpiece by Michael Benson.