What is the best CPU for video editing?

What your full budget? It's as much about the rest of the system especially the GPU as it is the CPU. I'd guess an overclocked 1700x with 32gb of Memory is going to be my answer but if you throw a $2500+ overall budget that won't be the answer
 


My overall budget is 2.2k, I was planning to stick my old GTX 960 instead of buying a new one.
 
PCPartPicker part list / Price breakdown by merchant

CPU: AMD - Ryzen 7 1700X 3.4GHz 8-Core Processor ($347.49 @ OutletPC)
CPU Cooler: Noctua - NH-D15 82.5 CFM CPU Cooler ($87.89 @ OutletPC)
Motherboard: Asus - PRIME X370-PRO ATX AM4 Motherboard ($149.49 @ SuperBiiz)
Memory: G.Skill - Trident Z 32GB (2 x 16GB) DDR4-3200 Memory ($238.99 @ Newegg)
Storage: Samsung - 960 EVO 500GB M.2-2280 Solid State Drive ($219.99 @ Amazon)
Video Card: Gigabyte - GeForce GTX 1080 Ti 11GB Gaming OC 11G Video Card ($683.99 @ SuperBiiz)
Case: Cooler Master - MasterBox 5 (Black) ATX Mid Tower Case ($59.99 @ B&H)
Power Supply: SeaSonic - PRIME Titanium 650W 80+ Titanium Certified Fully-Modular ATX Power Supply ($148.89 @ Newegg)
Operating System: Microsoft - Windows 10 Home OEM 64-bit ($89.89 @ OutletPC)
Total: $2026.61
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-06-13 19:42 EDT-0400

If you don't need a monitor/keyboard/mouse then this would be an absolute monster. Would be much better than even a $1500 6950x with your 960
 
A thread ripper with a 960 would get spanked by the above build in most cases the gpu does a lot more work than the CPU a good cpu is required to feed it but the thread ripper could be pretty cool just no idea of the cost of the subsystem around it.
 


Thanks for the response! Do you know when it's going to come out?