Since August 21st, 2023, YouTube has updated the code watch player size on browsers prior to 2021 by updating the width size and made it less buggy on 1920x1080 and above resolutions. So this fix should be needed.

Update: The new code was available for uBlock Origin (this also includes list view fixes), so here is the link for the new code.
https://pastebin.com/raw/i96r2ziv