If you were at a full time job with your own compnay and maybe a couple of assistants at events, which gear would you use for processing videos for the customers?
If I'm using Resolve Studio, the correct answer right now is either an Intel CPU with an iGPU + a high end Radeon, or a Threadripper with both Arc and Radeon hardware. That's the only video editing application I actually care about. Premier is a crashy mess on Windows for reasons that seem unrelated to graphics hardware, so I pay it no mind.
All I know is that the iNtel Xeres sucks for still image NR processing. I'm wondering if the new 155H with the Arch GPU chip is much better than the 1360P and Xe?
nVidia has CUDA, and a lot of applications seem to get support for their acceleration functions in CUDA before it is implemented elsewhere. That's what makes nVidia the safe choice for most people, even if it isn't always the best. You really, truly have to look at what your applications want and research to see what's supported. I know that isn't a concrete answer, but the reality is that every application is different. In some cases, a GPU makes literally no difference at all (e.g. Luminar AI) and in some, like Resolve Studio, can send quite a bit of work to the GPU.
Unfortunately, GPUs are in the same uncomfortable period right now that 3D Graphics accelerators were for gamers 30 years ago (Remember Glide? S3D? PowerSGL?). There's a bunch of weird and competing toolkits and capabilities and nobody is bothering to share anything, although AMD is standing around with its hands in its pockets croaking about OpenCL, which is generally seen as the lesser stepchild to CUDA in every way, shape and form.