No clear original source is attached to this short clip, and it circulates mainly as a standalone reaction sound rather than as a recognisable line from a film or show. That anonymity is part of its appeal online, where creators reuse tiny vocal snippets because they are flexible and do not carry a fixed character or storyline. Here da functions as a universal yes, understood even without translation, and its brevity makes it easy to drop into memes, chat replies, streams and short videos. Its continued use comes from that simplicity: one syllable, one meaning, and no context required.