Need recommendation for mini PC tower for editing

Not a good choice, in light of a complete lack of a discrete GPU. You see, all on-CPU integrated graphics solutions steal a very hefty amount of system RAM for itself - and once the iGPU steals that ram, it becomes completely unavailable for the OS and apps until the iGPU gets finished doing its work. In fact, Intel's IGP can actually steal as much as 32 GB of installed RAM, depending on how much RAM is installed! By default, the integrated Intel HD/UHD 600-series graphics steal more than 6 GB of RAM for itself at a minimum. This will result in system hangups and occasional crashes whenever you're rendering out something.

And due to the lack of adequate cooling inside that PC's particular case, the CPU will spend most of its time running at just its base speed of 2.3 GHz. Premiere Pro really runs much better at CPU clock speeds of over 4.0 GHz. Plus, the i5-8600T has only 6 cores and 6 threads - and it is all based on a twice-tweaked variant of an architecture that dated back to 2015 with the Skylake CPUs. Put the low thread count, low sustainable clock speed and old-ish architecture together, and you'll have a "newer" CPU that is weaker than even a quad-core i7 that's three years (or three CPU generations) older than that.

So, if you really want a mini PC that's suitable for up to 6k video editing, you have absolutely no choice but to build it yourself. I did exactly that in 2016, and with its current 4-core/8-thread i7-7700 CPU (which I upgraded to a year after it was first built) it completely destroys the performance of that HP mini PC; in fact, for a while it actually outperformed my main mid-tower PC (which at the time still had a Haswell quad-core i7-4790K CPU). In fact, that i5-8600T actually performs slower than even the i7-4790K, even without factoring in the resource-robbing integrated GPU.

So, simply put, all of the pre-built mini PCs suck. With the low-clock-speed CPUs and the complete lack of discrete GPUs included in such systems, it's no wonder why these systems will struggle with even 720p video, let alone 1080p or 4k. And this is all because the big-name OEM system builders for the most part are stuck in the old school "bigger is better" philosophy, intentionally nerfing their smaller PCs with substandard parts.

https://community.adobe.com/t5/video-hardware/article-by-dave-helmly-on-hardware-for-running-premiere-pro-aftereffects/td-p/11369321?page=1