Greasy Fork is available in English.
Moves the video description to the right of the video, adds options for smaller video, retro player, retro style, and more
< Feedback on Youtube - Right Side Description
Me too! I couldn't find the icon as well but seem like all the functions are still working well
The button seems to have disappeared, it was there some days ago and now its gone, I think this may be because of a Youtube layout update.