A little twist on the common ii V progression.
Usually, one would play Am7 and D7, with the typical options for improving over them, for example using the arpeggios of those chords:

Am7: A C E G
D7: D F# A C

Hereby one would typically play the G note for the Am7 chord and change to the F# note for the D7.

However, if we modify the chords a little bit, from Am7 to Am6, and extend D7 to D9, and mix arpeggios and pentatonics, we would end up with:

Am6: A C D E F#
D7: D E F# A C

The notes are the same for both chords…
Regardless of whether this is musically pleasing or not, you can use this backing track to practise this new dominant pentatonic scale

And what notes would you use over the F#m7b5 (half-dimished) chord?