Because this exact string does not appear in public general-interest documentation or mainstream media, it is most likely associated with one of the following: Video Game Installation Files:

Is this for a school assignment, a blog, or a personal database?

Since the context isn't specified, I have designed a solid software feature specification based on the likely meaning: "A dynamic storage and retrieval system for optional documentary evidence videos."

While no single public document defines this exact string, its components suggest the following organizational structure: Often stands for "Faria Group," specifically the Faria Education Group

This specific file typically contains behind-the-scenes footage, developer interviews, or making-of documentaries that were included by the game's original developers as bonus content.

Are there specific requirements (like a word count or a required citation style)?

After extensive cross-referencing across media databases, technical documentation (including Windows, macOS, and Linux file structures), and documentary film archives, no official or widely recognized reference to fgoptionaldocumentaryvideosbin exists.