This is of course not going to work as well as a dedicated streaming box. And though he says the audio from Premiere will also now playback on your machine (not sure how it does that, but he says it works, but I doubt they can hear you talk, so I would recommend LoopBack to the mix so you can combine Premiere and your Microphone to make audio (and run your computer through headphones so their isn’t audio feedback).
Pretty that you can try getting this running for free (or $99 for Loopback), though obviously dedicated hardware will run better.