Cast YouTube in Browser oleh Mark Kray

Control YouTube in your browser from your smartphone or tablet. Enables the YouTube for TV interface in your browser, which is normally blocked on desktop. YouTube TV supports casting from a mobile device.

Click on the YouTube TV button in the extension's pop-up menu and follow the instructions.
Or visit https://www.youtube.com/tv.
Press the ⚙ button at the bottom left.
Select "Link with TV code".
Optionally toggle full-screen mode in the browser by pressing F11 on your keyboard.