This extension is primarily for UltraWide monitors, but that does not mean it's only good for it. You can manipulate the size of the video that contains horizontal or vertical black bars and let the video fill your entire screen for a better experience.
Cross-browser extension that works in all browsers (except Safari).
It manipulates the aspect ratio of the video the currently watched video that is in full-screen. Enjoy the better experience on all screens, especially on UltraWide ones.
