Moin, I want to start with live streaming on Twitch and play Warzone. I don't have that good internet (12.5 Mbps download and 1.5 Mbps upload). Would it be possible to stream at least 540p and play Warzone?
So that's really not a good lead.
It depends more on your PC.
I think you need at least 25 Mbps to stream in a decent quality without stuttering in the case of an online game and on Twitch. Even then, I'm not sure that it will be 100% lag-free.
So you should have at least 5-10mb in the upload so that what becomes and a decent pc that creates both at the same time
So for 540p that could be enough, you just try it out?
I would stream on the PS4