YouTube is the world's number one video streaming site with over billions of hours of content available to watch for free. This makes the viewer actually not have time to watch the video that is available. I personally have issues watching long videos that don't use the Chapters feature that allows me to jump to interesting parts.
YouTube realizes this is not my only problem and has introduced a feature to automatically generate interesting scenes on videos. This feature is similar to Chapters which are automatically generated by YouTube's AI without requiring the involvement of the video owner.
Therefore, old content uploaded before Chapters was introduced will have sections that can be skipped directly because they are considered interesting. At this time this feature is only accessible to all users on the YouTube app on TV first.
It's similar to the interesting scene generation feature that avoids the boring part that only YouTube Premium subscribers could use last week.