Folklore and TikTok urban legends work on fundamentally similar mechanics - both rely on collective participation, mutation through retellings, and filling in gaps where real explanations don't exist. The backrooms thing is a perfect example because it started as an image, got adopted by a community, got expanded with rules and lore, and now exists as this shared mythology. That's exactly how folklore operates. The speed is different, sure, but the actual process of how stories gain power and spread is remarkably identical.
The thing nobody's really mentioned though - and this is kind of important - is that TikTok urban legends have built-in *permanence in a weird way*. With old folklore, stories changed because nobody had the original text to reference. But with these digital versions, you've got the original creator's version, the remixes, the debunks, all sitting there simultaneously. So folklore used to evolve through forgetting and reshaping, but TikTok folklore evolves while keeping everything archived. That's genuinely new and probably changes how these stories actually function in people's heads over time. They're more like evolving fanfiction than traditional folklore in that respect.
Whether it "counts" as real folklore depends on how strict you want to be about the definition, but I'd say it absolutely qualifies. It serves the same psychological purpose - it's how we process fear, weirdness, and the unexplained parts of our world. Your nephew's sharing these stories the same way kids have always swapped scary tales. The medium switched from campfire to phone screen, but the human need underneath didn't change at all 🍄