In fairness billiards is/can be used as a catch-all term that includes snooker and pool but it is its own game (I guess it’s kind of like Rugby teams calling themselves Rugby Football Clubs when they in fact have no football).
Billiards is played on a table with no pockets and there are only three balls - A red, yellow and white. I can’t say I’m an expert but I believe you get points by hitting all three balls and at least three cushions with each shot.
and you brought the term billiards into the discussion, which is a generalized term for cue-based games like 8-ball, 9-ball, cutthroat, snooker, carom, etc.
In the 1961 film The Hustler, the duration was 2hr 14mins.
They were going to make one about snooker, but they didn’t think the cinema audience would sit through a 16hr film :0)
Starring Paul Newman - Here is as ‘Fast Eddie’ (What a great moniker)