This specific string is frequently seen on file-sharing sites, forums (like Reddit or Coomer.su), and telegram channels where pirated content is redistributed. The "—2" simply indicates it was the second file processed in a batch or the second video in a specific post.
If you found this filename on a suspicious website or received it as an unsolicited link, avoid downloading or running it. Files with generic names from unofficial sources are common vectors for malware. Post — OnlyFans-2.mp4
Because this name is a generic template rather than a unique title, it does not refer to one specific video or creator. Instead, it is commonly associated with: This specific string is frequently seen on file-sharing