Greasy Fork is available in English.
Adjust video player to maintain 21:9 aspect ratio, filling screen minus sidebars and toolbars with minimal cropping, with dynamic full-screen adjustment
Ultrawide temporary fix for new Kick.com UI while the Ultrawidify extension does not work. Still have to manually specify video player by typing #video-player in advanced settings for kick in ultrawidify extension for it to work. Tested working on 3440x1440 you might have to edit it yourself with chatGPT help for other resolutions.