In any case you would need a capture device like the elgato cam link. Also judging by the specs so far I would be surprised if that laptop works for that. But we need more specs to be sure.
Yeah, I have no clue about that so you are probably correct. But wouldn’t that increase overhead?
2350m is … less than ideal. 4GB is also not optimal. I would try to get something with a bit more oomph if you really want to go dedicated and leave the laptop for something else.
Depends how you set it up I guess. If you do the PGP route with new compositing in OBS etc yeah definitely. If you’re just re-encoding a high-bitrate stream by just piping it into ffmpeg it should be fine.