Change the theme of YouTube
HOW TO USE:
1. Click on the extension icon to turn on/off the theme.
2. How to change the theme:
+ Right click on extension icon.
+ Click on Options.
+ Select the theme you want to apply.
3. Play video in the PinP mode: press F9 (on all site that you are playing video)
Advanced features: On the option page, you can remove black bars around video, hide the scrollbar, etc.