Thank you for your answers guys! I think I understand more about how I can go about this now. Yeah I was not using the term VOD right, I meant of course during a video stream.
Cool to see another MTG player rbartlet! I am one of two dudes behind aetherhub.com (The one thats not the pro developer and just an amateur) and im looking into making an extension for linking public decks from our site to the Twitch overlay.It is really good to head that I can do this by using the config view, I could have the streamer just paste the ID number of the Public deck he want to show. Or that I have the option of going the opposite way and maybe show the Streamer its TwitchUser ID in the config extension and make him paste that number in his site profile. Then all viewer requests with this ID would show that one deck the streamer selects on the site.
I might have misunderstood something here but at least this gives me the confidence to really dive into reading up more and trying out stuff with the extensions now that I know im am not dependent on implementing a Twitch login at the site. It seems to me that most other extension plugins do just this and it left me to believe that this was the only way.