I think it turned out badly on Nightly. 
Example bellow when browser is resized at 586 x 1107 pixels, approximately:
YouTube - Browser layout - Live chat panel
I use this size when I want to see something on Youtube while I do something else.
Thanks in advance.
I used this extension in the browsers:
Extension settings:
Video Sidebar:
โ Hide Recommended
โ Hide Playlist
โ Hide Fundraiser
Hide Shorts
Hide Mixes
Hide Merch, Tickets, Offers
Hide Inapt Search Results
Hide Explore, Trending
Hide More from YouTube
Disable Autoplay
Disable Annotations