NDI HX and HX2 support
I'm not sure how much work has been done to look into HX and HX2 support, but here are my findings:
I have a NDI HX device, it does not show up with the regular mDNS query (_ndi._tcp). Instead, it seems the discovery protocol uses SSDP (the monitor app does ssdp:discover for ssdp:all).
NDI HX2 seems to be using mDNS again. See also: http://www.sienna-tv.com/ndi/knowhowhx2.html