Is there a version of this in print?
I'm not a big fan of watching videos, even of things that I'm interested in. I think that that's because video goes at a speed, its speed. Print goes at no speed; or, rather, print goes at whatever speed you take it. Plus, you're also stuck with the voices on a video. The often grating, grinding voices of people who are clumsy at reading or speaking.
So, for me, anyway, reading about this would be much more enjoyable and rewarding.
(In the meantime, I'll put in a plug for Derek Bailey's Improvisation, its nature and practice in music. I read this first in my fifties, after a long involvement with music, both academically and practically, and with musicians, both professionally and personally. Well, professionally might be a bit of a stretch. My point is that I knew a lot about music when I first read Bailey's book. I had read a lot about music, had spent a lot of time with musicians, had performed music (amateurishly) for decades. And I learned more about music from that one, slim book than from any other source. Perhaps I learned so much from it because I already knew a lot. That's possible. But I still recommend it for anyone, however experienced or proficient.)