I hoped this was a don't recommend button for Youtube Videos, but it's not really practical.

We really need this button on the video page itself. And ideally with an icon that blends into the video player. And also has a confirm/undo pop-up

As it stands, this add-on just adds a bunch of red icons everywhere and it saves you literally one click. because the thumbnails already have Don't Recommend buttons in their hamburger menus

But I hope in the future you can fix this terrible mistake from YT of disallowing this feature on the actually video you're currently watching