Absolute Cinema Mode for YouTube per GM

Make YouTube's Cinema mode actually cinematic.

Press the Cinema mode button (or the T key) and Absolute Cinema Mode takes over the whole window:

• The video fills the window, edge to edge.
• The YouTube top bar gets out of the way, and slides back when you move your mouse to the top of the screen.
• Live chat and chat replay sit neatly to the right of the video, full height, at the width you choose.
• Close the chat and the video takes the full width.
• Scroll down any time for the description, comments and recommendations.

Works on regular videos, livestreams and livestream replays.

Settings (click the toolbar icon):
• Turn the extension on or off
• Auto-enable Cinema mode on every video
• Auto-hide the top bar
• Chat width in pixels (200–800, default 400)

No accounts, no tracking, no data collection. Your settings are stored in your browser.

Open source (MIT): https://github.com/Geeyehm/absolute-cinema-mode

Not affiliated with or endorsed by YouTube or Google.