View the full lesson at Jazz Up Your Blues 1 | JustinGuitar
Although you don’t yet have the text added here, would be VERY useful if you inserted the chord shapes that you use. Hard to follow voice and replicate chord shapes at the same time. Thanks.
Hello @JeffT53 and welcome to the Community.
I think I’m right in saying that all chord diagrams and similar are being updated and improved this year … I don’t know the timescale though.
Cheers 
| Richard_close2u | JustinGuitar Official Guide
hello I am a little bit confused by the A9 chord (at 3.47). According to the Autumn leaves chords lesson it could be called C sharp half diminished. Are they the same chord (based on what you consider the root note?)
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You’re totally correct.
Calling that chord A9 implies that there is a root note somewhere - not on this guitar - being played and it is the note A.
It is a rootless A9 chord.
The notes that are present make up exactly the four notes of a C#m7b5.
Context is a key factor.