If you want to stream on Windows, we have the right capture device for you. We commonly have used Blackmagic devices in the past, but below is a list we've tested in the office that you can try as well. This isn't a complete list of all the Windows compatible devices that are in the video streaming market; only the ones we have tested successfully.
Intensity Shuttle USB 3.0
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AverMedia Extreme Cap U3
Magewell HDMI to USB 3.0
Inogeni HDMI to USB 3.0
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Quick Note: If you are planning on purchasing any of these devices, please remember to keep your receipt and that there is a return policy from the website/store you buy from. Different capture devices can be incompatible with certain USB interfaces.