There is no single best length. A homepage explainer often works at 60 to 90 seconds, ads usually need to land the point faster, and demos can run longer for interested viewers. Choose by placement and test with your own audience.
The right length depends on where the video appears and how much the viewer already knows about you. These ranges are starting points, not rules.
Homepage explainer
A homepage video is for visitors who do not know you yet. Many land between 60 and 90 seconds. Put the problem and the payoff early. See explainer vs demo.
Paid ads
Ads compete with a fast-moving feed, so the hook has to come first. Shorter versions, such as 15 to 30 seconds, are common for social ads, and you can test several. See LinkedIn video ads for B2B.
Product demos
Demos are for interested viewers, so they can be longer. Keep each one focused on one task. See product demo script structure.
Onboarding videos
Short, single-topic videos are easier to find and finish. See onboarding videos that reduce support.
Launch and social clips
Cut-down versions of your main video work for social posts and launches. See the launch video checklist.
How to decide
- Write the one thing the viewer should remember.
- Cut everything that does not support it.
- Make one long and one short version.
- Compare how long people watch.
Ask for multiple cuts
Ask your editor for a main video plus shorter cuts. It is usually cheaper to cut versions during the edit than to commission them later. See the SaaS explainer service.
Frequently asked questions
Is shorter always better?
No. The right length is the time your message needs. Shorter usually works better for ads and homepages, but demos can run longer.
Should the homepage video autoplay?
Many sites autoplay muted and let viewers turn sound on. Add captions so it works without sound.
How do I know if the length is right?
Check where viewers stop watching in your video analytics, and test two lengths against each other.
Do I need different aspect ratios?
Usually yes. A 16:9 version for the website and a 9:16 or 1:1 version for social is a common setup.
Bhavesh Vaghela
Freelance video editor and motion designer in Rajkot, India. I make short-form videos, motion graphics, SaaS explainers, logo animations and AI video for clients worldwide.
