Greasy Fork is available in English.
Watch page description below the video with proper open/close toggle, instead of a side bar.
< YouTube - Proper Descriptionについてのフィードバック
I was going through some of the old messages, and noticed this.
This issue has been fixed since it was reported.
Using YouTube - Proper Description with Tapermonkey only removes the comment section and the description, doesn't put the description back under the video.