Turn Out the Lights

The entire page will be fading to dark, so you can watch the video as if you were in the cinema.

With one click on the lamp button, the page will be fading to dark. And automatic focus to the video. Click again, the page will return back as normal.

https://chrome.google.com/webstore/detail/bfbmjmiodbnnpllbbbfblcplfjjepjdn