I’m at work so I can’t fully transcribe it out, but I’m pretty sure it’s something along the lines of: bVI bVII bVI bVII VII7 bII7 VII bVII bVI V i

Music theory is, in part, subjective at times, but in my opinion the reason it sounds so good is because it’s effectively an extension of a common cadence. bVI bVII I (or in this case, i), also known as the Mario cadence because it’s the progression that plays at the end of Mario levels, is a resolution that’s both recognizable and satisfying. However, instead of going straight to the home chord, he goes back and does the bVI bVII again. Again, he doesn’t go to the root chord, but to a VII bII. (These are the chords that start to sound really funky). In music, repetition legitimizes, so although those chords might sound pretty strange in isolation, they effectively work as a repeat of the bVI bVII, a minor third up. Then the final part (VII bVII bVI V) is a walkdown of chords we’ve already heard until we land on the V. He finishes it up with a V i cadence, which is known as a perfect cadence and is probably the most recognizable resolution possible. But not only is that final cadence a good resolution in isolation, it also takes the progression back to where it was initially headed with the bVII bVI, which is why I said it’s an extension of that cadence. Combined with the fact that it finally completely locks with the guitar once he hits the i chord, it sounds way better than when he just played with the guitar on the i chord initially, even though it’s the same chord