Streaming - Looking for help!

Ok, so the question I have here is do I need a capture card installed into my PC to do streams. I have a Pinnacle Studio Plus that I use to record a lot of my matches and upload them to Youtube. Is there anyway for me to stream my xbox using the Pinnacle? I know through that I have to use Dyyno but i’m just not sure how to actually stream what im capturing. Any advice would be great, thanks.