An anonymous reader quotes a report from The Verge:
YouTube is always running experiments. One of its latest: testing an automated list of products detected in videos uploaded to the site. As of March 22nd this year, that test is being expanded to “people watching videos in the US,” according to YouTube. In one of its blogs, a YouTube representative gave a little more detail about how this particular feature will be deployed: "We are experimenting with a new feature that displays a list of products detected in some videos, as well as related products. The feature will appear in between the recommended videos, to viewers scrolling below the video player. The goal is to help people explore more videos and information about those products on YouTube.