The term breaks down systematically into functional software development shorthand:
By default, Unreal Engine optimizes builds by only including assets in the project. However, specific settings can force inclusion:
Think of fgoptionalunusedvideosbin as the in a car. You aren't currently "using" it, and it's "optional" for the car to drive down the street. However, the car's weight distribution and emergency readiness depend on it being there. Removing it might save you some weight (storage space), but you risk a breakdown if the system ever looks for it. The Science of Digital Storage fgoptionalunusedvideosbin
If you are currently debugging a specific engine build, managing an asset pipeline, or attempting to resolve a storage issue related to a specific application folder, providing the name of the exact software package or video game will help pinpoint the precise nature of this directory.
If you experience black screens during cinematics, you may have accidentally deleted this folder before the installation was complete [1]. The term breaks down systematically into functional software
files, including the optional ones, to ensure the setup completes successfully. Space Savings
: This file contains "unused" or redundant video files from a game, such as credits, duplicate intro cinematics, or developmental leftovers that the game does not actually trigger during normal play. Functionality If you experience black screens during cinematics, you
If the installer forces its presence, some users copy a smaller .bin file (like fg-06.bin ) and rename it to the missing optional file name to trick the installer into finishing .
⚠️ The standard practice for including video assets that are directly used in cinematics or cutscenes is to place them in a Movies folder within your project's Content directory. This location is automatically recognized by Unreal's packaging system. A folder like fgoptionalunusedvideosbin would only be necessary for more complex, non-standard scenarios.