Module 3: Chapters, transcripts and tagsLesson 7 of 114 min read
YouTube chapters: the rules that make timestamps work
Chapters split a video into named parts on the progress bar and make long videos easier to scan and search. You create them by listing timestamps in the description. The catch is that YouTube checks the list against a few rules and, if one fails, shows no chapters at all, without telling you which line was wrong.
The four rules
YouTube shows chapters from your description only when all of these are true:
- The first timestamp is 0:00.
- There are at least three timestamps.
- The timestamps go up in order.
- Every chapter lasts at least 10 seconds.
Automatic chapters
YouTube can also create chapters automatically, and you can turn that off. Timestamps you write yourself take priority and let you choose the titles.
The mistakes that break chapters
The most common problem is a list that starts at 0:05 or 0:10 because the intro was skipped. Next come two timestamps closer than 10 seconds, often a quick "subscribe" chapter, and a typo that puts one time out of order, such as 12:30 after 13:05. A missing colon or a stray character can also turn a line into plain text, so YouTube counts fewer timestamps than you think.
Long videos add one more trap: once a video passes an hour, writing every line as h:mm:ss (0:00:00, 0:12:30, 1:04:10) keeps the list consistent and easy to check.
After you trim the video
Cutting 20 seconds from the start moves every chapter 20 seconds earlier. Instead of retyping each line, shift them all at once by -20 seconds. The first chapter stays at 0:00. Any other chapter that would land at or before 0:00 has to go, and the next one must still start at least 10 seconds in.
Good chapter titles
Chapter titles show on the progress bar and in search, so write them like short headlines: what happens in that part, in a few words. "Results" is vaguer than "Battery test results". Keep the first chapter honest too; "Intro" is fine if it's short.
Check a list of timestamps against YouTube's rules. The example is ready to test.
Check these chaptersQuick check
Three questions. Pick an answer to see why.
What must the first chapter timestamp be?
Show the answer
Answer: 0:00 If the list starts later, YouTube shows no chapters.
How long must each chapter be?
Show the answer
Answer: At least 10 seconds Two timestamps closer than 10 seconds break the whole list.
How many timestamps does a video need for chapters to appear?
Show the answer
Answer: At least three Fewer than three and YouTube shows no chapters.
Rules change
Platform rules change often. Each guide shows the date it was last checked; when in doubt, the platform's own help page has the final word.
Sources
Last checked October 25, 2026