the PTZOptics producer pro kit includes an AKITIO external capture device that is designed to pull in up to 4 SDI sources into the included skull canyon NUC. this nuc requires the drivers for this capture device to be installed before this device will show up as a source in your streaming software. these drivers can be found HERE. once this file is downloaded the entire folder will need to be extracted and the application "MWDriverInstaller_x64" must be ran (as seen in the pic below) once this install is completed close your video streaming software and relaunch it, and when the software is relaunched you will now see the 4 SDI inputs.