YouTube is testing Notes, an experimental crowdsourced tool to let users add context to videos, similar to X's Community Notes, on mobile in the US in English (Aisha Malik/TechCrunch)

https://techcrunch.com/2024/06/17/youtube-is-experimenting-with-notes-a-crowdsourced-feature-that-lets-users-add-context-to-videos/
http://www.techmeme.com/240617/p15#a240617p15