The game will function perfectly without them, though you will see standard-definition versions of the cinematics instead. Recommendation Skip it if:
fg-optional-4K-videos-3.bin is a selective component of a FitGirl game repack. It contains high-resolution 4K video assets that are separated from the main installation to reduce the initial download size for users who do not need or want 4K quality. Overview & Purpose fg-optional-4K-videos-3.bin