Streaming BoinxTV Video program

I need an assist in getting my live school TV program online on my school intranet. Currently have a Roland VR-3EX mixing video into BoinxTV on a new iMac, connected via BlackMagic Studio recorder. We used to run the show over a school video system, but as the TVs die and the school is not replacing/repairing them, I need a way to stream my program but have no idea how or where to start. Do I need another computer? Software? Interface?