LOL - at first glance I thought he had three thumb rests on that bass.
Seriously though, unless he uses a forced full neck playing style (running all the way down the A and E strings vs using the G and D strings) I can’t imaging how this would sound good. The A/E string pup is close to the neck potentially making those notes which already have a tendency to be thicker sounding even more boomy. Then he has the G and D string pup way down by the bridge potentially making those two strings sound even thinner than normal. Looks to me to be a very unbalanced sound across the four strings at any given fret location. I don’t know what his control layout is, but I guess you could compensate for the unbalanced volume and tone to a degree. Bottom line - not a layout that I’d blindly copy on any of my basses.
Now if he had reversed the two pup locations I’d consider it an interesting build with some cool potential. Warm up the bright strings and brighten up the warm strings makes a lot of sense. Which is why a number of top name builders offer a reverse P pickup in their basses.
All that said, I’m sure he makes more money doing what he’s doing than I could make doing what he’s doing.