Alright. Having watched it, it is much closer to what I'd hoped ("we must build upon 'yes, and'" rather than rejecting or restricting it per se). For those DMs who need to hear this, it's well-made. I just am not of the opinion that this is the useful advice a lot of DMs today need. I think they need to learn how to say "yes(, but/and)" a lot more than they need to learn to say "no." So I worry that this is like teaching a novice trombonist advanced jazz techniques while they're still learning their arpeggios; it may very well be the case that this young trombonist will go on to exclusively play jazz, but high-level improvisational jazz teachings, even if well-taught, may have deleterious effects on the steps between "learning the basics" and mastery.
At the very least, though, I hope this will teach those DMs that I consider to be far too quick to say "no" and far too slow to say "yes" the idea that flat "no" (and often even flat "yes", too!) should essentially always be followed with "...and" or "...but," and that "no, and" is really a tool of last resort, something to fall back on when you're completely out of options and unable to muster the creativity to develop a satisfying alternative. She does make quite clear for her own table that she actively avoids "no, and" if at all possible, but I fear that some might take that as "oh, that's what you do, so I can just ignore that" rather than the clear implication, which is that "no, and" is just a really undesirable option compared to the other three.