The Verge has reported that there is a hidden dark mode feature for YouTube in Chrome. Here’s how to activate it.
- Make sure you have the most recent version of Google Chrome (that’s version 57 onwards)
- Open up the developer window by hitting Ctrl + Shift + I on Windows, or Option + Command + I on Mac
- Select the “console” tab
- Paste in the following text: document.cookie=”VISITOR_INFO1_LIVE=fPQ4jCL6EiE” and hit enter
- Close the developer window, refresh your browser, and the dark mode toggle is available in the main settings menu in the top right. Turning it on is as easy as flicking a light switch.
— The Verge (@verge) April 14, 2017