YouTube Music's latest redesign of the Now Playing page is making its way to iOS and Android devices everywhere. There's a new feature that brings an extra social element to the app. You'll now be able to read and post comments on the Now Playing page. That option was limited to playlists until now.
According to screenshots that 9to5 Google shared, some of the comments on the page may date back several years. As such, it seems like Google is populating the section with comments from related YouTube videos, for better or worse (probably worse).