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
< 脚本 Youtube - Right Side Description 的反馈
Also, Everything breaks in fullscreen.
I've the same problem, I suppose it happens because the id of the tag used as hook for the right description is no more loaded at the beginning of the page loading but after the end (when this script finished its execution). I hope he will fix the script.
I made similar script in my profile http://greasyfork.icu/en/scripts/452405
Description does not appear on the right side. Am I missing something?