Knowing if it was in a script , an art gallery , or a shared folder would help pinpoint the exact "piece" it belongs to.

In indie and underground music scenes, artists often record sessions or video clips over Skype to capture a lo-fi aesthetic.

It could be a contemporary performance piece designed to be viewed as a "leaked" or "archived" Skype call. The portion of the filename is not a standard video extension (the file itself is a .mov ), but might stand for: National Theatre Board (or a similar arts organization)

While it is not a widely known "standard" file (like a system driver), it is most likely associated with one of the following: 🎭 Performance Art or Monologue