John Naughton and Sean French are baffled about how someone could put this sequence together of 100 quotes from 100 films counting down the numbers from one to one hundred.

Naughton thinks that it’s un-Googleable. Well it’s very Googleable. Or rather, with a good knowledge of various sites, you could do it.
It’s worth noting that the sequence includes a lot of popular classics. Many of the lines are either familiar themselves, or come from films that have significant fan-bases. Those films have digital scripts and quotation collections to be found around the internet.
IMDB, for example, has a page that lets you search among quotes listed on the site. Using letters and numbers, you could quickly generate a list to get editing from.
As an example, a search for “thirty-seven” brought up Clerks, Men In Black (used in the video), Mission Impossible II, and Who Framed Roger Rabbit, as well as other films I’ve not seen.
The editing is, of course, the slow part. But I’d also make use of somewhere like Drew’s Script-O-Rama which has hundreds of scripts and transcripts for more searching and for finding where in the various films, the quotes occur.
Of course, if I was doing this, I’d share the load. I’d get a film studies class on the case. 30 students each finding 3-4 clips a piece would soon give me what I wanted.
Anyway, a seemingly impossible job without an obsession like Peter Greenaway, is actually very doable. And the guy who made it, writes about it here.