UNC-TV creates hundreds of hours of original programming a year and much of it needs to be edited into the final product you would see on your television. That equates to thousands of hours of raw footage and B roll that must be seen in order to create that final product.
Nowadays, most of the material is digital and can be viewed from an office PC, laptop or similar device. In years past, it might be on any manner of videotape that could require a special tape deck or playback machine to watch. Thus screening rooms were set up where producers, directors, talent and other personnel could view raw footage or the perhaps a final edited product.
FYI: since the advent of digital, these screening rooms are virtually unused and most have been converted into audio booths or coopted as storage space or something else entirely. What’s in this one? Can’t tell you – the door is locked.