Can Video Enhance AI run on CPU only?

I have a 40-thread CPU (Dual Xeon 10-core with hyperthreading) system but it has a old GTS250 video card.

I’m considering buying Video Enhance due to the sale, but with the impossibility of buying a GPU currently, will I be able to use this at all (yes, I know it would be slower) and what limitations would I have (certain models requiring GPU, etc.)?

Does VEAI take advantage of high core/thread counts?