Use it when time needs to be visible without becoming the whole scene.
What is an overlay timer, really?
An overlay timer is a countdown or running clock designed to sit on top of footage, a live layout, or a screen recording. It gives the viewer a sense of pace without forcing a full-screen timer scene or a separate app window.
Creators usually use one for webinar segments, workout intervals, study sessions, breaks, challenge videos, and tutorial chapters where timing matters. The best overlay timers stay readable in motion and do not fight the subject, subtitles, or the action in frame.