How to fit YouTube player to available browser window?

Question

Youtube video player has changed size overnight in Chrome and I can't seem to fit it to available screen anymore. Relevant info:

• Ubuntu 16.04
• Chrome v68.0.3440.106 (Official Build) (64-bit)
• Screen: FHD 1920x1080
• Resolution: 1368x768 (16:9)
• Chrome Zoom: 125%

I have tried every zoom and resolution, can't seem to fit the player to available screen.

Answer 1

You have to install Youtube Enhancer it is available for Firefox as well. For Chrome just click this link

You'll see extra buttons like Cinema Mode, Fill In, etc.