Alright, posting this now, before hearing more than about three seconds of audio: In general, I'm a big fan of "yes, and" for D&D, and roleplay in general. I recognize, as she said in those few seconds, that RPGing is not 100% identical to theatrical improvisation, and I presume she will heavily qualify that statement as soon as I hear more. I'm mostly just...well, a real damn skeptical audience right from the get-go because I've seen a lot of arguments I find deeply wanting that aimed to take on "yes, and" DMing.
Will post again actually responding to the content therein.