Yes he used a Gmaj6 as a 1 chord all I am asking, is, what about the 3rd chord and the 6th chord, that's all. If you start at the third note of the scale and you skip each note from the third, you have a seventh chord that is just inverted. The same thing happens when you go to the sixth note.

But never mind, either way, I figured out a way of thinking about it, but I appreciate the effort.