Unfortunately the article doesn't have an example, or a comparison image. Other reports are similarly useless as well. The most that seemed to happen is that the wrinkles in someone's ear changed. In case anyone else wants to see it in action:
https://www.reddit.com/r/youtube/comments/1lllnse/youtube_sh...
I skimmed the videos as well, and there is much more talk about this thing, and barely any examples of it. As this is an experiment, I guess that all this noise serves as a feedback to YouTube.
replies(3):