Videos to FL and FP: John Backus: Function Level Programming and the FL Language 1987 (https://www.youtube.com/watch?v=FxcT4vK01-w&t=15s), John Backus Group Meeting - IBM Research - 5 July 1989 (https://www.youtube.com/watch?v=KzBkb-bvNK4), Backus on functional programming (https://www.youtube.com/watch?v=OxuPZXXiwKk) from Original: Oral History of John Backus (https://www.youtube.com/watch?v=dDsWTyLEgbk)

The first video is the same as https://softwarepreservation.computerhistory.org/FP/#Backus1... .

I hadn't seen the Group Meeting video; I will add it (even though it's very rough).

I will change the entry for [Booch2007] to include the video as well as the transcript.