Short reaction vocals like this one spread through meme and short-form video culture because they are instantly readable without any context. A single oooooooh can signal surprise, sympathy or mock disappointment in under three seconds, so editors reuse it as a shorthand for the audience's own response. Its popularity comes from that flexibility: it fits sports fails, reality television moments, gaming clips and everyday surprises equally well, and it remains useful because it never ties the joke to one specific show, character or event.