Is there a video guide on how this works?
There is no video guide. I always try to make the tools as intuitive as possible, but if you have any questions, please let me know.
This tool starts with a reference palette (there is one already in place, but you can customize it). For example, you place the colors you use for the vegetation in a drawing in the reference palette. Then, you choose another color from the derived palette to generate a new palette for a building or for the ground or whatever you need. The new palette will be equivalent to the reference palette.
It also has an “inspiration” component with random buttons (rnd) that will generate random palettes—reference or derived—so you can work with them as well.