: Choose your Blu-ray drive or load an image file.

Why does this matter? Because menus matter. Extras matter. Picture-in-picture commentary tracks matter. An MKV strip is great for watching the movie; FindVUK + KEYDB lets you preserve the .

Use VLC (with libaacs and KEYDB in the right location) to open the Blu-ray folder structure directly—not an MKV, the actual BDMV folder. If it plays menus, your key is valid.

FindVUK is an open-source Windows tool (runs fine under Wine on Linux/macOS) that does one brilliant thing: it extracts AACS Volume Unique Keys from and aggregates them into a clean, shareable KEYDB.cfg.