UltraWide for Safari expands YouTube video contents to ultra-wide and wide monitors. With UltraWide for Safari YouTube HTML5 videos are adapted so that they fit a large monitor without black bars. The extension comes with a preference pane with presets for 21:9, 16:9 and 4:3 aspect ratios.
* Introducing Keyboard Shortcut CTRL/CMD + w (for wide) to quickly enable/disable UltraWide for Safari
Ratings and Reviews
With Family Sharing set up, up to six family members can use this app.