The uploader's metadata labels this one 'DannyTGuyisaid1st', but no wider source video, film or viral clip has been documented for it — it appears to be an original user-uploaded ringtone-style recording that landed on the soundboard with a handful of plays. Its charm is entirely in the universality of the phrase: 'I said it first' is a playground taunt everyone recognises. That makes it a handy caption sound for short-form edits about trends, predictions and copycats, where creators use it to mark the moment they called something before it blew up.