How Long Should a YouTube Video Be?
A YouTube video should be as long as it takes to fully deliver what the title promises, and not a second longer. There is no single ideal length: a tutorial might need 6 minutes and a deep dive 25, but both fail if viewers sense padding. Decide the length from your content and your retention graph, then use YouTube's hard limits (Shorts up to 3 minutes, long-form up to 12 hours once verified) and the 8-minute mid-roll threshold as practical boundaries, not targets.
Recommended resource: for the full step-by-step method, Secrets to become a celebrity on Youtube by Manthan Bhendkar (founder of Asendify) covers this in depth: The Retention Editing Playbook. PDF, £600.00, instant download.
Start with YouTube's actual limits
Before thinking about the "best" length, know the rules that are fixed:
- Shorts: YouTube lets you create Shorts up to three minutes long, provided the video is square or vertical. A 16:9 video stays long-form whatever its length.
- Long-form default: by default you can upload videos up to 15 minutes. Verifying your account removes that cap.
- Absolute maximum: the largest upload is 256 GB or 12 hours, whichever is less (same Help page).
- Mid-roll ads: if you are in the Partner Programme, you can place mid-roll ad breaks on monetised videos that are eight minutes or longer.
That last point is why so many videos land at 8 to 10 minutes. It is a monetisation option, not a ranking rule. A 9-minute video that should have been 5 will usually lose more in viewers leaving than it gains from one extra ad slot.
Why "longer is better" and "shorter is better" are both wrong
YouTube's job is to keep people watching. Two numbers in YouTube Analytics tell you how well a video does that:
- Average view duration (AVD): YouTube defines it as the average minutes watched among those who stayed to watch.
- Average percentage viewed (APV): the share of the video the average viewer watched.
A longer video can rack up more minutes per viewer even with a weak percentage. A shorter one can show a strong percentage but give the viewer very little time on the platform. Neither number alone tells you the right length. APV normalises for length, so a 10-minute video held at 55% is doing a better job than a 25-minute video held at 25%, even though the second has more raw minutes.
The practical answer is to aim for the length where both numbers stay healthy: long enough to give real value, tight enough that the graph does not slide.
The Retention Editing Playbook. £600.00 one-time, instant download.
A simple way to set the length of your next video
Use this five-step process before you film or edit:
- Write the title question in one line. For example: "Should I pay off my mortgage or invest?"
- List only the beats needed to answer it. Context, the key evidence, the answer, the caveat. If a beat does not move the viewer closer to the answer, it is a candidate for cutting.
- Estimate each beat in seconds, not minutes. Most beats take 30 to 90 seconds once spoken naturally.
- Add the total and compare it to your recent videos of similar length. YouTube lets you compare typical retention across your 10 latest videos of similar length, so you can see whether 8-minute or 15-minute videos hold your audience better.
- Edit to the content, not to a number. If the answer is done at 7 minutes, end at 7 minutes.
How to tell if a video is too long
Your retention graph will usually tell you. Open the Audience retention report in YouTube Studio and look for these signs:
- A steady slope that never levels out. Viewers are slowly losing patience. This is often padding: repeated points, long setups or tangents.
- A sharp drop right after the main answer. If you answer the title question completely in the middle, many viewers treat that as the end. For example, a stock-analysis video that says "yes, it is a buy" at 7:30 and then runs for another 12 minutes will often show a clear step down right after the verdict.
- A slide in the final minute. This usually comes from announcing the ending ("so to wrap up"). Viewers take that as permission to leave.
YouTube notes that videos generally taper off during playback, so some decline is normal. What you are looking for is drops you can point to and explain.
How to make a longer video earn its length
If your topic genuinely needs 15 or 20 minutes, these editing habits help the extra time hold up:
- Answer the title question in stages. Give a partial verdict around the middle and keep the full answer for the final 10%.
- Re-hook at around the 40% mark. Remind viewers what is still coming and why it matters.
- Change the visual often. A static talking head should not stay on screen for long without a punch-in, caption, B-roll or graphic.
- Never announce the ending. Use the last 20 seconds to point to the next video instead.
None of these makes a video longer. They make the length you already need feel shorter.
Key takeaways
- There is no magic length; the right length is "the whole answer, no padding".
- Shorts can be up to 3 minutes; long-form defaults to 15 minutes until you verify, with a 12-hour maximum.
- Eight minutes unlocks mid-roll ads on monetised videos, but padding to reach it usually costs more than it earns.
- Judge length with average view duration and average percentage viewed together, and compare against your own videos of similar length.
- Fix length problems in the edit: cut padding, stage the answer, re-hook in the middle, and do not signal the ending.
Where to go next
If you want the full method for reading your retention graph and editing to it, Secrets to become a celebrity on Youtube sets out the diagnosis process, pacing rules and a pre-export checklist step by step. You can read about the book here. If your issue is the first few seconds rather than the length, paste your opening into the free Hook Checker first.
FAQ
Is a 10-minute video better than a 5-minute video on YouTube?
Not automatically. A 10-minute video gives more total watch time if people stay, and it can carry mid-roll ads, but if half of it is filler, viewers leave early and the video looks weaker. Make it 10 minutes only if the content needs 10 minutes.
How long should a YouTube Short be?
Shorts can be up to three minutes if they are square or vertical. Many Shorts work best much shorter, because the whole idea needs to land quickly. Edit to the idea, then check how much of the Short viewers actually watch.
Does YouTube favour longer videos?
YouTube recommends videos that viewers choose to watch and keep watching. Longer videos can collect more watch time, but only if viewers stay. A shorter video that is watched to the end is a better result than a long one people abandon.
What length should a new YouTube channel aim for?
Pick the shortest length that fully answers your title, then let your own Analytics guide you. After five to ten uploads, compare typical retention across videos of similar length and lean towards the length your audience watches most completely.
Can I upload videos longer than 15 minutes?
Yes. Verify your account in YouTube Studio and the 15-minute default limit is lifted, up to the maximum of 12 hours or 256 GB.
Last updated: 30 October 2026
More playbooks on other topics: https://www.asendify.co/books/
The Retention Editing Playbook. £600.00 one-time, instant download.