Nice! I just noticed in the second video, you did the Circle of Fifths/Fourths thing.
Makes me think of that phrase in Yesterday:
A-B-E-C#m7-F#7-A-B9sus-E - (But I believe in Yesterday). I do realize the A breaks the cycle, but it sits inside of an F#m7, so, technically, the cycle isn't broken (Tonic/Parallel substitution)
A-B-E-F#m7-B7-E-C#m7-F#7-F#m7-B9sus-E. (ii-V-I / ii-V / ii-V-I) The first and middle ii-Vs are disguised/hidden but it's there. (ii(IV)-V-I; vi-V/V-ii-V)
Essentially, meaning that they move over. You've got your first ii-V-I, but knowing the what the next chord is in relation:
Here's Autumn Leaves:
Many don't realize it (or at least verbal it), but the first three chords are a ii-V-I; it's usually an afterthought since the first chord played is the Cm7. The melody implies the first chord. But here's how it moves over looking at it from a linear perspective:
Gm-Cm7-F7 (ii-V-I)
F7-BbMaj7-EbMaj7 (ii-V-I)
Am7b5-D7-Gm7 (ii-V-I)
If you look at ths via the Circle of Fifths/Fourths diagram (going right would be fourths, going left would be fifths):
G @ 12, C @ 1, F @ 2. ii-V-Is see shifts of an hour. Therefore, C-F-Bb would be @ 1, 2 and 3, respectively; however, if you were to imagine the circle actually turning, C-F-Bb would really be @ 12, 1, and 2. Use a face clock, for something tangible or craft or own device.
But yeah, what you said in the first video is that, no note is a bad/wrong one; however, one must know how to use it correctly, so it won't sound as such. Walking is one of these techniques useful for providing movement within a progression. This can be done with the single melody note or a full chord.
G7sus-G7#5b9-CMaj9 (V-I) (D-D#-E)
G-GMaj7-G7-C (V-I) and the VMaj7 subs wonderfully for the V7/V (D7) as they both contain the F# which leads to F (G7) which leads to E (C).
Tonic-Leading Tone-Subtonic-(all of the dominant chord - G)-Mediant - (of the tonic chord - C) The intervals from point A to B - P8, M7, m7, M3)
This is known as voice-leading which you did an excellent job of demonstrating.
I've been called a theory nut (among other colorful/delightful adjectives), so my apologies. Btw, I'm a piano/keyboard person, but it's just as useful to us as well. Not to mention being a member on another forum (which seems alot worse than my posting here. I have some doozies there as well! Having said this, it is VERY informative and also guitar center (not solely) as well.
Good job on the video again and I'll get around to watching the others.
I've been called a theory nut (among other colorful/delightful adjectives), so my apologies. Btw, I'm a piano/keyboard person, but it's just as useful to us as well. Not to mention being a member on another forum (which seems alot worse than my posting here. I have some doozies there as well! Having said this, it is VERY informative and also guitar center (not solely) as well!
The link's in my sig if you wish to visit.
Good job on the video again and I'll get around to watching the others.
P.S. You may ignore 85% of this post! :)