It is possible you encountered this term in one of the following contexts:
installer might throw a "file not found" error during the CRC check. Best Practices for Installation Check the "Selective Download" list: fgoptionalunusedvideosbin link
Only look into this link if:
: Never skip files labeled fg-01.bin , fg-02.bin , etc., as these are required for the game to function. Why skip them? It is possible you encountered this term in
If we interpret strictly as a technical term: fgoptionalunusedvideosbin link