This digit in parentheses usually indicates a duplicate file count on a local drive (e.g., the 119th time a file with that name was saved) or a specific ID assigned by a third-party downloader tool.
Files shared on unofficial "leak" sites or through peer-to-peer networks are often used as "wrappers" for trojans or spyware. Messages — OnlyFans(119).mp4
It is important to note that files matching this naming pattern—especially when found outside of the official OnlyFans site—carry significant risks: This digit in parentheses usually indicates a duplicate