The exact origin of this alien beep boop clip is unknown, but its style comes from decades of cartoon and arcade sci-fi where simple synthesised bleeps stood in for alien language. Short electronic sounds like this spread easily on soundboards and in game edits because they need no context to be understood. Creators reuse the same few chirps to signal a UFO sighting, a broken robot or first contact played for laughs, and the sound has stayed popular because it is instantly readable, family friendly and easy to layer over any footage.