ETC Codec?

I am trying to figure out why the ETC does not work with the Blackmagic Design UltraStudio Mini Recorder when all the listed specs for both devices indicate (to a noob) that it should. Does it have something to do with codecs? I realize it’s a big learning curve with video stuff, especially with capture, formats and conversions and such, so I don’t even know if this even applies. But I can’t find anything in the ETC specs that addresses what kind of output format it uses other than saying it puts out at 720p60. Anybody have any idea? Thanks!