Here's an exercise I've been doing lately. Unfortunately haven't recorded any video,
In my left hand I play rootless 9th chords over 2-5-1 progression, both major and minor and then with standard rooted 7th chords over the same progression. RH improvises (I really need to learn to play arpeggios - in any hand ;-) I'm going like this through all 12 keys.
Backing is done with the iReal Pro app.. Piano sound is Kurzweil ME-1 old MIDI module and Studiologic SL88 controller.