I love the old YouTube Poop "cliche" sources because there's like... a consistency to them, but also a randomness to them if that makes sense? Kitschy low-budget kids' media, usually edutainment or video game tie ins, are the usual digestion, but they're also intersperced like little peanuts with bottled water commercials; beloved but pre-vulgarised adult cartoons; and legitimately talented poets. Some of them are really obvious and recognisably nostalgic, others are really obscure and were only discovered out of loose relations to an existing more popular source, and a lot of material you'd expect to be seen as a goldmine (for example: the DKC cartoon; the Mortal Kombat cartoon; the live action Mario movie; English version Ronald McDonald adverts; Captain N; the already memetic Filmation catalog) are completely glossed over - some sources were literally just used for one scene! You'd see a whole lot of "Stu making pudding" but not much else from Rugrats for example.