Absolute Cinema Mode for YouTube by 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. Upcoming livestreams show their full thumbnail too.
• The YouTube top bar gets out of the way, and slides back when you move your mouse to the top of the screen. Scroll down and it stays put, like a normal header.
• Live chat and chat replay sit neatly to the right of the video, full height.
• A Twitch-style button on the corner of the video hides and shows the chat. Hidden chat stays loaded, so it comes back instantly, and the video takes the full width meanwhile.
• Drag the chat's left edge to make it wider or narrower. Drag it all the way and the chat hides.
• Switching in and out of Cinema mode keeps the chat where it was, without reloading it.
• 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
• Twitch mode: on livestreams and replays, chat stays pinned to the side of the window, Twitch-style. The regular view keeps the title and buttons under the video, and Cinema mode becomes a no-scroll, video-and-chat-only view
• Chat view: always open Top chat or Live chat (or leave it to YouTube)
• Chat width in pixels (300–800, 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.