Is your video the right length for the platform?
Pick a platform and enter your duration. Check the length against the platform's limits and our working guideline — or missing it by seconds.
YOUTUBE SHORTS · TIKTOK · INSTAGRAM REELS · LONG-FORM
In the sweet spot for YouTube Shorts
- 30s sits inside the 25s-55s working guideline range (a rule of thumb, not platform data).
- Focus your effort on the first 3 seconds — that's what decides completion rate.
YOUTUBE SHORTS RULES
Shorts can run up to 3 minutes. Our working guideline is 25-55 seconds: a rule of thumb of ours, not YouTube data. Platform limits change, so check before you publish.
MIN
1s
SWEET SPOT
25s–55s
MAX
3m
WHY LENGTH MATTERS
Each platform has its own bias.
Four platform rulesets
Distinct sweet-spot ranges for YouTube Shorts, TikTok, Instagram Reels, and long-form YouTube — each with the platform’s stated limits.
Sweet-spot verdict
Get a green / amber / red read on whether your duration sits inside the range the platform actively rewards.
Retention-aware notes
Every verdict comes with guidance on what the number means for completion rate and shelf placement.
LENGTH IS ONE SIGNAL. THE SCRIPT IS THE REST.
Duration is a rule of thumb.
Script OS flags the risky sections.
VANTAGEVID's Script OS gives each script section an AI-estimated retention score and flags the riskiest sections with suggested fixes — long before you hit publish. It is an estimate, not your audience data.
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Frequently asked
Is there an ideal length for YouTube Shorts?
Shorts can run up to 3 minutes. Our working guideline is 25-55 seconds. It is a rule of thumb of ours, not YouTube data, so use it as a starting point and compare with your own Shorts in YouTube Studio.
What's the sweet spot for TikTok?
Our working guideline is 21-34 seconds. It is a rule of thumb of ours, not TikTok data. Longer videos work too, if the first few seconds pay off.
How short can Instagram Reels be?
Reels can run up to 3 minutes. Our working guideline is 7-15 seconds, a rule of thumb of ours rather than Instagram data. Check your own Reels insights to see what works for your audience.
Does this matter for long-form YouTube?
Yes, a little. Monetized videos of 8 minutes or longer can carry mid-roll ads, and our working guideline is 8-12 minutes. It is a rule of thumb of ours, not YouTube data.
Does this replace real retention analysis?
No — length is just one signal. Script OS inside VANTAGEVID gives each script section an AI-estimated retention score and flags the riskiest ones. It is an estimate, not your audience data.