Short message alerts have become a staple of online video because they instantly communicate that something new has arrived without needing any dialogue or on-screen text. This clip is labelled in its file data as the sound of a multimedia message arriving, a type of alert associated with phones receiving pictures and videos alongside texts. Creators now reuse that familiar notification style in skits, reaction videos and memes, where a single chime can set up a joke, a twist or a reveal in under two seconds.