fullscreen in readme

README.md

@@ -24,6 +24,7 @@ Control your YouTube shorts just like a normal YouTube video! Features include p
 - **Progress bar** at the bottom with time and duration
 - **Seeking** 5 seconds backward and forward with arrow keys (adjustable time)
 - Mini **timestamp** and speed above the like button (can be scrolled on!)
+- **Fullscreen** support with F key
 - Decrease and increase **playback speed** with keys U and O
 - Click the speed button to revert to normal speed or toggle between different speeds
 - Toggle to auto skip short when current one ends
@@ -55,6 +56,7 @@ Extra features:
 | Increase Speed      | KeyO       |
 | Decrease Volume     | Minus      |
 | Increase Volume     | Equal      |
+| Toggle Full Screen  | KeyF       |
 | Toggle Mute         | KeyM       |
 | Restart Short       | KeyJ       |
 | Next Frame          |            |