During the intro (0:00 ~ 0:04),
The chord progression is: I maj7 -> IV maj7 -> b VII maj7-> b III maj7 -> b VI maj7 -> II7-> b II maj7 -> V
What is this called? Is this an example of an extended "II-V"?
Where can I find more examples like this?
These are all variations of the circle of fifth:
(I would also subsum the tritonus substitution and the chromatic scale downwards... )
with a less sophisticated and more generous analysis we could get a better understanding of the harmonic process.
looking for another piece with a similar progression?
here is one at 1:42 min
the bass plays the circle of fifth: B-E-A-D-G-C-F-E
organ, piano and guitar play: B7-Bb7-A7-Ab7-G7-F#-E