stream w/ facecam , record gameplay only

How i can i stream with my facecam to twitch/mixer ect. but also record the gameplay sperate ? For editing later .

I like the multi task alot

I know this is rough and may come to a 2 pc set up My current setup i started with .

Xbox 1 - astro a40s

Elgato HD60s ( external device ) Laptop ( i5 , 12GB ram , internal graphics >.< ) runs 720p max Mic ( external ) 3.0 usb hub Gaming montior 144 Hz

I know this wasnt my final set up but i wasnt sure i was into it so i slowly bought random stuff till now im getting ready to hop back over to pc but still would like to know if theres a way so i can learn that troubleshoot. And run around.

I aware of the open double OBS but it doesnt work with how my setup is for now

Im using obs S.labs right now but like obs lol