YouTube is testing to bring Chapter feature, actually what is that.?
YouTube is creating a new feature called Chapters for Videos.
The UI looks a little different in the video player. The scrubbing timeline is divided into sections for each chapter, and hovering over each one will show the chapter's title (again, taken from the description) and your progress through that particular section.
This feature takes the timestamps for the description specified by the creators and automatically converts them into chapter markers for video. And it is unclear at the moment whether it will expand to all video creators and users around the world.
Chapters have started showing up for some YouTube viewers on some channels. They are generated based on the timestamps the creators have included in their video description.
~By