This string typically relates to the game's "Official" or "Deluxe/Premium Deluxe" content delivery system, specifically handling the optional high-resolution documentary video files that come with the premium editions.
Based on the common terminology used in digital communities, it looks like you’re asking about the "fg-optional-documentary-videos.bin" fgoptionaldocumentaryvideosbin exclusive
SELECT * FROM video_assets WHERE bin_id = 'fgoptionaldocumentaryvideosbin' AND exclusivity = 'exclusive'; This string typically relates to the game's "Official"