Chapters
Chapters split a long video into themed sections with a timestamp at each start, letting viewers jump directly to the part they want.
Chapters are YouTube's native in-video table of contents, auto-generated when the description contains timestamp lines like `00:00 Intro`. Introduced in 2020, they're now expected on any video longer than 10 minutes. SumTube's AI derives logical chapters automatically, even for creators who don't supply them.