Edit your YouTube video description to include formatted timestamps of the chapters or key moments of your video. This will show the chapters in the video timeline, on the video page as chapters, and in Google search results.
1. Determine your video chapters or key moments
Find the timestamp of each key moment you want to highlight. Here are the guidelines from YouTube and Google:
On your YouTube channel, edit your video details. Anywhere in the description section, add your timestamps, each on one line starting with 00:00.
YouTube and Google will do the heavy lifting and automatically add your key moments to the time bar, the chapter section, and the google search results!
Your video description can contain more than just your chapter timestamps. You should take advantage of the 5000 characters you are allowed to add important keywords for your SEO results.