Record and play back a Skype for Business meeting - Microsoft Support
The term "piece" might refer to a or a visual art piece .
Musicians have been known to use Skype to record guitars and vocals or to route DAW audio into calls. 📂 Personal or Archive File If you found this on a shared drive or a computer: It is likely a Skype video recording that has been renamed.
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)