Universal Video Downloader

Universal Video Downloader is a powerful video detection and download tool for Microsoft Edge. It automatically detects video resources on any webpage using a five-layer detection engine, and lets you download them with a single click.

KEY FEATURES:

• Five-Layer Detection Engine: DOM scanning + XHR interception + Fetch interception + MediaSource hooks + Video prototype hooks — catches videos that other downloaders miss.

• Universal Format Support: MP4, WebM, M3U8/HLS, TS, FLV, DASH, MOV, MKV, M4S, and more. Works on virtually any website with embedded video.

• M3U8/HLS Segment Download: Automatically downloads all TS segments and merges them in-browser into a single playable file.

• Built-in Progress Panel: Real-time download speed, ETA, progress bar, and segment-by-segment status grid — no external dependencies.

• Cross-Origin Support: Handles cross-origin iframes with intelligent URL extraction and CDN referer checking. Works with Bilibili, Weibo, and similar platforms.

• Draggable Floating Button: Compact UI that stays out of your way. Drag to any position, press Ctrl+Shift+V to toggle.

• Privacy-First: 100% open source (MIT). No ads, no tracking, no analytics, no data collection. All processing happens locally on your device.

USAGE:
1. Navigate to any page with a video
2. Press Ctrl+Shift+V or click the purple floating button at top-right
3. Detected videos appear in the panel — click to download
4. Watch real-time progress in the embedded panel
5. Downloaded files save to your default Downloads folder

The extension uses host permissions exclusively to fetch video files from CDNs during user-initiated downloads. No background network activity occurs without explicit user action.