Certain video editing or 3D rendering suites create complex local file trees to cache temporary renders or store optional stock footage. How to Proceed Safely

did you see this term? (e.g., a specific game folder, an error message, a website)

FGOptionalUnsedVideosBin is a directory commonly found in game installations, particularly in games developed by FromSoftware, such as the Dark Souls series, Bloodborne, and Sekiro: Shadows Die Twice. The name itself can be broken down into several parts:

FGOptionalUnusedVideosBin is a folder that appears in the file system of computers running Unreal Engine, a popular game engine developed by Epic Games. The folder is usually located in the C:\Users\YourUsername\AppData\Local\Epic Games\UE_4.21\Engine\Content directory, but its location may vary depending on the Unreal Engine version and installation.

To save on download size, repackers often separate high-resolution or multi-language videos. This folder holds those "unused" or "optional" video files that the installer doesn't strictly need to run the core game [1, 2].