I put "just work" in quotes as by "just work" I mean "MC can access them and process the av feed" as opposed to "they play flawlessly".
specifically I'm referring to @Yaobing's comment in the sticky thread
https://yabb.jriver.com/interact/index.php/topic,67300.0.htmlNo additional configuration is needed for video capture devices in Media Center 20 or higher.
the sort of device I'm referring to is a capture device like
http://www.magewell.com/usb-capture-hdmi-plus which says it is compatible with "Any other DirectShow, V4L2, QuickTime,AV Foundation based encoding or streaming software" and is also listed as having UVC support.