I've been doing a bit of research on this as I am about to build my video editing PC!
It actually depends a little bit on the editing software you use. Some video editing software renders using primarily CPU and some editing software is more dominant in using the GPU for rendering. So it may tip the scales as to whether you'd spend more on your CPU vs spend more on your GPU (video card). Of course the dream would be a high end processor and a high end graphics card! But if you have to stick with a set budget you may need to trade off more CPU spend vs more GPU spend.
But also some video editing software is better able to use multiple CPU
cores vs only utilizing 1-4 cores. So again need to research your software choice.
IMHO, it is easier to replace your graphics card later then it is to replace your processor, especially when new processor generations often come with new sockets/new motherboards/new RAM. So personally I'd get the best processor you can today, with a little cheaper graphics card. Then plan to upgrade your graphics card in 6-12 months when budget allows.
Now if we have to pick a processor to answer your question.... I would choose a new Intel Core i7 or i9 processor maximum
single core performance OR I would choose an AMD Ryzen for the
highest number of cores for the same price. Both AMD and Intel produce many processors at various price points that are competitive and choosing one is a bit like choose iPhone vs Android (a religous debate online!!). But if you buy smart with an upgrade plan for future, it probably doesn't matter whether you go AMD or Intel.
Personally,
I just bought an Intel Core i9 10900k very recently released. If you want to see my video editing PC build you can connect with me on social!
@BensTechLab everywhere. I'm going to be covering all the tech stuff related to setting up a youtube channel/studio. (I have my processor, ram, ssds and graphics card already - waiting for the motherboard to arrive!!)
Let me know what video editing software you are using! (or thinking of using). I'm likely going to stick with DaVinci resolve, although lots of tech how-to people also seem to use Camtasia.