YDTM — YouTube Default Theater Mode

Opens YouTube videos with the theater mode or fullscreen mode enabled on by default. Can be switched to enabled or disabled anytime.

YDTM — YouTube Default Theater Mode Watch YouTube videos the way you want: wide, centered, and without the comments sidebar opening every time you load a video. YouTube's redesigned watch page often opens with the comments/description panel expanded, which shrinks the player and shifts it off-center. YDTM makes theater mode the default. Videos start with the side panel closed and the player centered, and comments stay out of the way until you choose to open them. KEY FEATURES • Theater mode by default — watch pages load with the comments/description panel closed and the player centered. • No visible flash — the panel is intercepted before it paints, so you don't see it open and snap shut. • Fullscreen by default — optionally open each video in fullscreen automatically. Fullscreen triggers once per video load; after you exit, YDTM leaves you in theater mode and will not force it back for that video. • Easy exit — leave fullscreen with Esc or the on-screen Exit fullscreen button. • You stay in control — open comments whenever you want. YDTM handles the initial page load and does not fight you after that. • YDTM button — a new button below YouTube's Ask button opens the extension's settings. • Two simple switches — Enable Theater Mode by Default and Enable Fullscreen by Default, available from both the YDTM button and the toolbar popup. • Survives YouTube data clears — the preferences are stored in Chrome extension storage, not YouTube cookies or site data, so clearing cache or site data does not reset them. • Works with YouTube's single-page navigation — switching videos keeps the theater and fullscreen behavior consistent. • Light and dark — the settings dialog follows YouTube's theme. • No tracking, no ads, no analytics, no data collection. HOW TO USE 1. Install YDTM. 2. Open any YouTube video. The comments sidebar stays closed and the player is centered by default. 3. To enable automatic fullscreen, click YDTM below Ask or use the extension's toolbar icon, then turn on "Enable Fullscreen by Default." 4. Fullscreen opens automatically with each video. Press Esc or click Exit fullscreen to leave it; it will not re-open for that video. 5. To change theater mode, use the same settings dialog or toolbar popup and toggle "Enable Theater Mode by Default." 6. Click YouTube's Comments button whenever you want to read or write comments. YDTM will not close them after the initial page load. PERMISSIONS • Storage — saves your preferences in Chrome extension storage. • Access to www.youtube.com — reads the watch-page layout, adds the YDTM button, and applies the theater and fullscreen views. • No additional permission is required for automatic fullscreen. PRIVACY YDTM does not collect, store, or transmit personal data. It makes no external network requests and contains no analytics or tracking. NOTE YDTM is designed for YouTube's current watch-page layout with the right-side Description, Comments, and Ask rail. YouTube changes its interface from time to time, so updates may be needed if the layout changes. YDTM is an independent project and is not affiliated with, endorsed by, or sponsored by YouTube or Google. YouTube is a trademark of Google LLC.