Uh, not sure what you are asking
The cameras are sending live video feed (via some protocol, there are many possibilities, each with their own nuances) to a computer running OBS. Right?
Now OBS is a compositing tool (ie combine multiple sources into a single video output (Recording and/or Streaming)
So - what do you want 'Full access' to? and what does Full Access even mean.. sorry, you are asking a technical question I'm suspecting in non-technical way using technical terms.
Do you mean remote control the OBS PC? or to take the OBS output, and stream it not only to some common livestream receiver [Content Delivery Networks /CDNs] (ie YouTube, Twitch, Facebook, etc) but also some other system/device locally? If yes to the latter (view OBS output on another local PC), then OBS has something called Projector Mode (I believe, I haven't looked into it, this is from memory, and I believe is often used with something like a HDMI output). There is also a possibility of sending the video signal out via NDI (iirc). And most CNDs receive RTSP traffic, and there is a multi-output plugin, so you could send a copy of that same RTSP output to an alternate destination
So... it depends on what you are asking as to if and how to solve for you request [as best as I can tell]. With some clarity on your part, maybe I can help better?
