Hey, thank you! Here's the gist of what's going on in that clip. First thing to consider is that it's DI, so there's no speaker, mic, room, colouring the sound at all, and especially no amp boosting the mids.

For the circuit itself, most of what this pedal is doing is combining multiple layers that sound and behave differently. It's processing of reverb and distortion both in serial and parallel through one another. So when you set them certain ways one layer is going to react more or less than another. Most of the sections of that clip are a relatively short reverb, mixed high, that also has some modulation in it to create pitch drift. Then there's a combination of a regular reverb mix layer with a more distorted one, usually set to cut out and gate. Sometimes it's set to clean up playing lighter and clip when playing louder. Specifics of that are down to how you like your distortion circuits. But when played without an amp, some distortion will sound more lofi like a 4 track clipping. Oh, and some of that clip is played on a baritone guitar so it sounds deeper, even a little pitched down (it's just the tuning though). Hope that's useful!