I know how to solo over chord progressions and follow the chord for the most part, but can never cop this specific sound. Is it the backing track chords that are producing that fusion sound over this? I have a feeling if he would continue playing, and you were to turn off the backing track, it would lose all of its charm. Is the key changing as each chord happens here, and he's just choosing a different scale for each chord? I have never seen any good lessons online for this sort of style. Everything I have found has either been "hey learn these fusion licks" But I have never found a curriculum that goes through the theory of this particular style. I call it fusion, but fusion is such a wide umbrella. This is a very specific style of fusion, and I hear it from people like Guthrie Govan, Rick Graham, and Tom Quayle.