A YouTube Short can be up to three minutes long, but the best length is the shortest that fully delivers your idea. Many successful Shorts are 15 to 45 seconds, while longer Shorts work when they tell a story or teach something that keeps progressing.
Shorter Shorts often get higher completion and rewatch rates, which help distribution. Longer Shorts can build more watch time but need strong pacing. Test lengths with similar content and compare viewed rates and average percentage viewed.
Step-by-step plan
Start with 15–45 second Shorts.
Use longer Shorts only for stories or tutorials.
Cut filler before choosing a length.
Compare retention across lengths.
Settle on the length your data favours.
Example: the same recipe is posted as a 28-second Short and a 95-second Short. The shorter one averages 105% viewed thanks to rewatches, while the longer one averages 48% and gets fewer views.
Why this works
YouTube Shorts are served in a swipeable feed where the key metric is "viewed vs. swiped away" in YouTube Studio. Shorts can now run up to three minutes, but the feed still rewards videos that stop the thumb instantly and get rewatched. Unlike TikTok, a strong Short can keep pulling views for months, and Shorts viewers can be converted into subscribers when the channel has a clear, repeatable promise and related long-form or Shorts to binge.
Common mistake to avoid
Stretching Shorts toward three minutes without enough content. Longer Shorts must hold attention far longer, and padding causes swipes.
Pro tip
If a Short needs more than a minute, add a progress cue like "3 steps" at the start. It tells viewers the video has an end point worth reaching.
Check it before you post
Don't guess why your video is stuck.
Upload it to VIRAL AI to get your Viral Score, predicted views, and instant hook fixes in 20 seconds. VIRAL checks your first three seconds, pacing, captions and on-screen text against patterns from high-performing YouTube Shorts videos, flags the exact moments viewers are likely to swipe away, and suggests stronger hooks you can film before you post. It is free to start on iPhone, Android and the web, so you can test every idea before it goes live.
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