This comes from one of our partners here in Canada:
I tested the USB video output from a Vaddio RoboSHOT 12 QUSB and was able to get streaming. I then added an HDMI video source and was able to switch between the outputs successfully.
I then tried the Vaddio RoboSHOT 12 QUSB using HDMI and audio from the Vaddio EasyUSB mixer amp connected to Vaddio USB table top MicPODS and I was able to successfully stream this as well.
These are not the most common types of camera/audio we would generally see with Webcaster X2, but I think it shows that you can use Webcaster in a wide variety of workflows.