Answering CPU depends on more that what you've listed. a 6-core/12-thread CPU should be fine for years, though personally I spec'ed a 8-core/16-thread CPU to get an extra year or two of life (hopefully)... see my posts for details. How much CPU you need depends on EXACTLY what you are doing (any chroma keying, audio filters, etc)... My brand new i7-10700K system is complete overkill for what I'm doing today, but I also purchased for may years of use, and being able to video edit, just in case. Personally, I'd have preferred a Ryzen, PCIe v4 system instead (better security, and longer usable/performant life with PCIe v4)... but longer discussion..