Pet peeve tangent: why is it that so many renditions of All Blues, including the purported instructional video linked earlier in this thread, get the changes wrong? In Miles Davis's version, the change is from G to Gm, not G to C7. And the bass repeats the G pattern (i.e., does not change to a C pattern as in a conventional blues) until the turnaround.
I hope someday the correct chords will become common knowledge and people will stop playing those bar band changes.
Hi I’m the person who made the video in question that peeved you so much!
What you failed to notice from my introduction is that this was a jam round the ‘solo’ section of All Blues. Maybe you only watched the jam at the start?
I agree that under the head the bassist would stay on the riff in G but in the solo section moving up to C with the riff or walking is often done and is perfectly acceptable in my opinion. It’s Jazz! You’re free to imply substitutions and additional chords in your bass lines, in fact this is how tunes are commonly developed during solo sections. It adds interest.
Hope that helps.