O.K., here is a quick theory breakdown:
If you really look at the RH chords, you will see that there are only 3 of them:
Eb major (1 chord) = Eb-G-Bb, G-Bb-Eb, Bb-Eb-G
Ab major (4 chord) = Ab-C-Eb, C-Eb-Ab, Eb-Ab-C
Bb major (5 chord) = Bb-D-F, D-F-Bb, F-Bb-D
Now, for the LH notes I play, it's true that they are scale degrees, but also each note is contained somwhere in the RH chord. Since this is the case, we are merely playing inversions of those three chords I mentioned earlier. Let's take it chord by chord:
Eb / F-G-Bb-Eb
In the LH, we have an Eb, which is the 1st scale degree in the key of Eb. In the RH, we have an Ebadd9 chord, which is a 1 chord in Eb w/the added 9th, D. Since the 1st scale degree is in the bass, the entire chord is a 1.
Eb / Ab-Bb-C-Eb
In the LH, we have an Eb, which is the 1st scale degree in the key of Eb. In the RH, we have an Abadd9 chord, which is a 4 chord in Eb w/the added 9th, Bb. Since Eb is a note in the 4 chord, we are actually playing an inversion of the 4 chord, w/the 5th being in the bass. Since the 1st scale degree is in the bass, the entire chord is a 1.
*So, basically for the first 2 chords, we have a 1-4 progression, but we keep the 1st scale degree in the bass
C / Eb-Ab-C
In the LH, we have a C, which is the 6th scale degree in the key of Eb. In the RH, we have an Ab major chord, which is a 4 chord in Eb. Since C is a note in the 4 chord, we are actually playing an inversion of the 4 chord, w/the 3rd being in the bass. Since the 6th scale degree is in the bass, the entire chord is a 6.
D / F-Bb-D
In the LH, we have a D, which is the 7th scale degree in the key of Eb. In the RH, we have an Bb major chord, which is a 5 chord in Eb. Since D is a note in the 5 chord, we are actually playing an inversion of the 5 chord, w/the 3rd being in the bass. Since the 7th scale degree is in the bass, the entire chord is a 7.
*So far we have a 1-4 progression for the first 2 chords, now for the next 3 chords, we have a 4-5-1 progression, but we have different notes of those chords in the bass
The only chord that sticks out in this song is:
C / F-G-Bb-Eb
In the LH, we have a C, which is the 6th scale degree in the key of Eb. In the RH, we have an Ebadd9 chord, which is a 1 chord in Eb. In this case, we have to look at the chord as a whole. Let's do this by stacking the chord up: C-Eb-G-Bb-(D)-F Here, we see that this is a C minor 11th chord, and the root of the chord is in the bass. A C minor 7th chord will also work here if you leave out the F. So, here we are actually playing a 6 chord, and since the 6th scale degree is in the bass, the entire chord is a 6.
*So, to pull this alltogether in progression format, this is what we have:
Into = 1-4 progression
Verses and Chrous = 4-5 progression, 1-5 progression, 4-1 progression, 4-6-5 progression
Does this make any sense? If you still have questions feel free to ask!!!