As a proof of concept and by spending as least amount of money as possible, I lugged my home computer, DSLR, and microphone to one of our weekly work performances. The computer ran CasparCG playout software, and had a decklink HDMI capture card, for video input from the camera. This computer streamed the video via UDP over the facility wifi to another office computer that had a cheap ATI graphics card added to it to give S-Video output which fed into the existing SD modulator instead one of the DVD players, and from there into the buildings tv network and every TV.