Clock ticking is one of the oldest sound cues for passing time, long used in film and television to signal waiting, urgency and a deadline approaching. In online video it became a handy shorthand for the same feeling, because listeners recognise the rhythm instantly even without seeing a clock. Creators reuse it for countdowns, quizzes, challenges and suspense edits, and its simple, loopable beat makes it easy to drop under almost any scene. That familiarity is why it remains a staple of short-form editing.