Glossary
What are chapters in a video?
By the KeyMo team · Updated
Chapters are named sections of a long video or podcast, each starting at a set time. On YouTube they come from a list of timestamps and titles in the description, or from automatic chapters. They help viewers jump around, and they give a clipper a ready map of where the topics change.
Chapters in video and in podcasts
A chapter is a label plus a start time. The viewer sees the sections on the progress bar or in a list and can jump straight to the one they want. A podcast episode works the same way: show notes list a time next to each topic. The W3C WebVTT format even has a chapters kind of text track, next to captions and subtitles, so chapter lists can travel as a file.
A chapter is a topic, not a clip. It might run ten minutes. A clip is the one answer inside it that stands on its own.
YouTube's chapter rules
| Rule | What YouTube's help page says |
|---|---|
| Where they come from | A list of timestamps and titles in the video description, saved in YouTube Studio |
| First timestamp | Must start at 00:00 |
| Minimum count | At least three timestamps, in ascending order |
| Minimum length | 10 seconds per chapter |
| Manual vs automatic | Your own chapters override automatic ones |
| Automatic chapters | On by default for new uploads, but not every video is eligible; active strikes or content that may be inappropriate to some viewers makes them unavailable. Creators can opt out in YouTube Studio |
To link to a point in a video, the Share panel has a Start at option. YouTube's help example enters 2:30 for 2 minutes 30 seconds.
Using chapters to find clip-worthy sections
Read the chapter titles before you scrub. Titles that name a claim, a question or a story are better candidates than titles like "Intro" or "Housekeeping". Then use these rules.
- A title that states a surprising claim: open that chapter first and look for the sentence that makes the claim.
- A title that is a question: the answer is often the first clean stretch after the host asks it.
- A chapter right after a sponsor read or a break: the speaker's energy often resets there, so the first minute is worth a listen.
- A very long chapter: expect several clips in it, not one.
YouTube's key moments for audience retention report points the same way. It shows top moments, where almost no one dropped off, and it only appears for videos at least 60 seconds long with at least 100 views. If a top moment falls inside a chapter you were going to skip, listen to it.
Example: a 60-minute interview
This chapter list is made up to show the method. It is not taken from a real episode.
| Starts | Title | Length | Clip chance |
|---|---|---|---|
| 00:00 | Intro and sponsor | 3 min | Low |
| 03:10 | How the show started | 9 min | Medium: one origin story |
| 12:40 | The mistake that nearly ended it | 14 min | High: a claim and a story |
| 26:30 | What he would tell a new founder | 17 min | High: several advice answers |
| 43:20 | Reader questions | 12 min | Medium: pick the best question |
| 55:10 | Where to find him | 5 min | Low |
Two chapters hold most of the promising material. That is a better place to start than minute zero.
Common mistakes
- Leaving out 00:00 as the first timestamp, which YouTube requires.
- Fewer than three timestamps, or a chapter shorter than 10 seconds.
- Vague titles such as "Part 2" that tell a viewer nothing.
- Treating a whole chapter as the clip. Most chapters are far longer than a clip should be.
Where KeyMo fits
You do not have to write chapters before using KeyMo. You paste a YouTube link (paid plans) or upload an MP4 or MOV, and it returns up to 15 scored clips, each with a one-line reason. Chapters stay useful as your own map of the episode, and for checking whether the clips came from the parts you expected. If you need a chapter list written, the YouTube chapter generator is a better fit.
Sources: Video Chapters, YouTube Help (checked 11 October 2026); Share videos and channels, YouTube Help (checked 11 October 2026); Measure key moments for audience retention, YouTube Help (checked 11 October 2026); WebVTT: The Web Video Text Tracks Format, W3C (checked 11 October 2026).