YouTube Shorts must run 15 to 60 seconds to qualify, and most creators see stronger results in the 20 to 40 second range because shorter videos tend to hold attention and earn replays. If you have access to the newer 3-minute test, use it only when the extra time truly serves the content, not the format.
Essential Concepts: 15 to 60 seconds, vertical video, 20 to 40 seconds often performs best, replays and retention matter, over 60 seconds becomes a standard video
