Chapters make a video easier to navigate, and they're free SEO real estate — each chapter title is indexable text tied to a specific moment in your video. The format is strict, though, and getting one detail wrong means YouTube ignores the whole list.
The exact format
Each chapter is one line: timestamp, a space, then the title. For example:
0:00 Intro 1:15 Why this approach works 4:40 Common mistakes 9:02 Wrap-up
Three hard requirements: your first timestamp must start at 0:00, you need at least three timestamps listed in ascending order, and each chapter needs to be at least 10 seconds long. Miss any of these and chapters won't render on the timeline.
Where to place them
Don't put your chapter list at the very top of the description. The first ~200 characters are prime SEO space — use them for your hook and primary keyword, then drop the chapter list just below that.
How to add them
In YouTube Studio, go to Content, open the video, and add your timestamp list directly into the Description field, then save. YouTube automatically turns the list into clickable chapters on the video timeline and as links in the description — no separate settings toggle needed.
Writing chapter titles that actually earn their SEO value
"Intro" and "Outro" are the two most wasted chapter titles on the platform — they're indexable text, and generic labels waste that space. A chapter titled with a real keyword phrase ("Why This Approach Works for Small Kitchens" instead of just "Method") gives YouTube's search index and Google's video search real, specific text to match a query against, in addition to helping a viewer scanning the timeline decide whether to jump there.
The same logic that applies to your video title and description applies here: describe what's actually in that segment, using language your audience would search for, rather than a one-word label that only makes sense once you've already watched it.
Getting the timestamps right without manually scrubbing
Manually re-watching a video to note down exact timestamps is the slowest part of this process, and it's easy to get a boundary slightly wrong. If your video has captions, our Timestamp Generator pulls real, evenly-spaced points from the actual caption track and seeds each one with the real spoken text at that moment, so you're refining a real starting draft instead of writing chapter titles from scratch.
Key Takeaways
- Format: timestamp + space + title, one per line, starting at 0:00
- Minimum 3 chapters, each at least 10 seconds long, in ascending order
- Place chapters below your first 200 characters, not at the very top
- Use real, specific keyword phrases as chapter titles, not generic labels like "Intro"
Source: YouTube Help — Video Chapters.
