Features
⏭ High-Precision SponsorBlock Integration
Frame-Perfect Skipping: Uses a requestAnimationFrame tracking engine that polls the timeline at your monitor's native refresh rate (60Hz–144Hz+). This avoids the lag and missed segments typical of standard HTML5 timeupdate loops.

Zero-Overhead API Calls: Fetches segment timestamps directly from the public SponsorBlock database asynchronously the exact millisecond a video loads.

Comprehensive Coverage: Auto-skips built-in ads, intros, outro end-screens, unpaid self-promotions, interaction reminders ("Like & Subscribe"), preview snippets, and off-topic musical content.

🔊 Smooth Mouse Wheel Scroll Volume
Localized Trapping: Changes volume only when your cursor is hovering over the actual YouTube video frame, ensuring normal web page scrolling still works everywhere else.

Custom Visual HUD: Displays a clean, sleek, minimal on-screen volume indicator overlay right over the video, styled natively to look like it belongs on YouTube.

🎭 Intelligent Auto-Theater & Quality Enforcement
Instant Theater Layout: Forces the spacious theater configuration right as the DOM mounts, completely bypassing layout shifting.

Hardcore Quality Lock: Actively targets and locks the highest possible video streaming layer (4K/1080p) using synchronous API injection, fighting back if YouTube tries to downgrade your resolution dynamically during mid-playback buffering.

Technical Specifications & Architecture
Unlike bloated browser extensions, this userscript utilizes a highly optimized native design footprint:

@grant none Isolation: Runs directly in the unprivileged window scope. It bypasses sandbox isolation layers completely, ensuring the absolute fastest execution timings possible.

Smart MutationObserver Lifecycle: The setup engine relies on a targeted MutationObserver to watch the container bounds. It automatically disconnects its event hooks the moment the DOM pieces mount, ensuring it consumes 0% CPU once initialization finishes.

SPA Adaptive Routing: Fully compatible with YouTube's Single Page Application architecture. It hooks cleanly into internal yt-navigate-finish events to cycle state seamlessly across multi-hour browsing sessions without memory leaks.

Installation & Setup

1. Prerequisite Extension
   You need a userscript manager extension installed in your web browser.