The practice of filming a montage around your local neighborhood or town to play during intermission. Though you could say intermission as well, since that was a legacy concept that was inherited from plays and eventually died out as well.
The idea of an intermission is something that I think should be entertained. 2001 A Space Odyssey has a 10 minute intermission for instance. It can also split up potentially longer pieces.
“The length of a film should be directly related to the endurance of the human bladder.” - Alfred Hitchcock
IIRC Tarantino experimented with it in The Hateful Eight, in some theaters.
>What died out?
The custom of showing film consisting of footage of the general public in movie theaters.
Showing locals little movie clips of themselves in intermissions at the local theater.