Dark Skin for Youtube™
Changes the YouTube theme to a dark one. Really useful when watching videos at night. You can switch it on or off using a single button.
To use just install an click on the icon at the top-right bar of Opera. This will toggle the dark skin and the standard one.
Code is on github: https://github.com/stormbreakerbg/Dark-youtube-plugin-chrome
- This extension can access your data on some websites.