Another nice helpful video!
I like the idea of using four strings in the way you demonstrate, playing one way and then sort of reversing it like a mirror image, then moving the whole business along the length of the fretboard.
I often do this with any old chord on four strings or even three or two strings. Reversing the LH pattern really helps me find the ideal balance in the wrist and forearm.
Also when I do these types of exercises chromatically along the fret board I will nearly always incorporate at least one open string, just for fun.
My favourite thing you do is the speed bursts, changing tempo at will but very smoothly. I’m terrible at that. Thx for posting!