It needs to render 60 minute 1080p clips in a reasonable amount of time. Desktop or laptop.
Clips can be everything from simple cuts strung together to highly edited segments with loads of filters and effects.
If its specifically for MATI clips then I don't think you need much in terms of render heavy effects like color grading or special effects so the benefits you'd get out of a workstation grade Quadro are minimal.
Depending on your budget you can skimp out a lot on the GPU, a last gen RTX 4080/4090 or even a 3080(ti)/3090 will get you quite far. (or equivalent AMD GPU).
But make sure to combine that with a decent CPU and loads of available RAM (talking anywhere in the 32 - 64gb range).
You'll probably want some M.2 NVMe disk as a primary storage for fast file loading. When choosing an NVMe SSD look for the PCIe version and make sure the CPU and motherboard can handle those speeds. PCIe 5.0 is the newest generation. Can't go wrong with a Samsung NVMe.
For a mobile/laptop option, this might be controversial but honestly if mobile video editing is a must (and you have the budget) you can't go wrong with a Macbook pro. Most windows based "workstation" laptops are bulky behemoths that shred through their battery. Apple's offering in terms of performance and comfort is not bad, it just costs boatloads of money.
Uber budget tier: you can pick up a secondhand GTX TITAN Xp with 12 gigs of VRAM for about $200 - 250, it still kick ass even in 2025. This card should be able to eat 1080p renders for breakfast.