The phrase oui je l'ai vu is everyday French for yes, I saw it, and online it has become a short reaction clip rather than a quote tied to a known film or show. Its spread comes from creators using foreign language confirmations as punchlines, where the meaning is understood from context even by non French speakers. The very short length makes it easy to loop, layer over screenshots, and reuse as a soundboard button, which is why it keeps appearing in meme edits and reaction videos.