https://en.wikipedia.org/wiki/Zapruder_film

Obviously "video" existed then in the sense that there was television -- but consumer video cameras didn't appear until around 1979 or 1980.

The first consumer video camera (camera that recorded to tape rather than film) wasn't until the BetaMovie in 1983 with VHS coming months later. Heck, _home_ video recorders were still 15-20 years off at the time.

I was thinking more of the situation where some people might be confused with the Zapruder recording, that it could be on videotape instead of film, which is why I didn't try to cover all the corner cases.

It still doesn't say that video includes "film". You can make a video recording of a film of course, but that's different.

And even if it didn't, what did you think I meant? And how is that even relevant to the question?

It seems you were confused about something that used to be a very obvious distinction, that not too long ago no one would trip up on (the difference between "video" and "film"). It's not especially relevant of course, it was just weird.

Because never once in my 40-some years as an English speaking American have I ever seen this distinction. The two words are functionally synonyms in common usage, or perhaps the common usage would be something like "film" is a subset of "video".

Perhaps it varies with geography or industry? Maybe Americans use the terms interchangeably but Brits don't? Or maybe within the entertainment or photography industries experts use the terms with more precision than the average citizen?