I'll do it very briefly.
Know me in the streaming area not very good, but wanted to start with it.
I have a PS4 Pro and wanted to stream using the Elgato HD60S, does my PC have to be good for that, or what requirements does my PC have to fulfill? Or is it all about the PS4, find the Internet only system requirements to stream from the PC, but wants to stream from the PS4, because the problem is that my PC is a good 10 years old.
If your PC is 10 years old, it says nothing about its current performance and software! We do not know how many times and how much you have upgraded it (which I assume, if you have played on it). You have to give it a try. But I suspect that it probably is not more likely. But before you spend money on a new PC, you can just try it.
Thank you for your help, I do not have the Elgato product yet, wanted to know before buying even if my PC must be good if I stream it over the PS4. My PC still has a quad processor and a GTX275. Both now heavily obsolete.