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Cat-Catch vs VideoCacheView: catalog facts
Cat-Catch	VideoCacheView
Free Free, with source published on GitHub.	Free Freeware from NirSoft, free to use and redistribute unmodified.
Browser extension	Windows
Detects media resources automatically as a page loads Downloads HLS m3u8 streams	Scans several browsers' caches in one pass Copies cached videos out for later playback
Cannot save DRM-protected streams Documentation is mainly in Chinese	Cannot merge YouTube's separate video and audio streams Firefox must be closed before its cache is written to disk
Browser extension	Downloadable app
Open source	Closed source
License not stated	License: Freeware
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.