Video chapters have made it easier for you to get to sections of the clip you want to get to. But the company is testing out a new way to skip to the parts you're interested in watching. As you see in the GIF above, the slider pulls up previews of what's in the video, so you can skip to the exact part you want to check out. YouTube plans to test the feature out with Premium users. It says you should keep checking youtube.com/new for the feature to come out.