This clip comes from the endless stream of user-uploaded sound effects rather than any film, game or show, and its maker is unknown. Generic robot roars like this live on soundboard sites because creators constantly need short, punchy mechanical growls for edits, and two seconds is exactly the length that drops cleanly under a cut. Its popularity reflects a wider habit: editors layering synthetic roars under robot reveals, boss entrances and AI-themed memes to borrow the feel of blockbuster sound design without licensing a studio sample.