Here's his latest video: https://youtu.be/mKWfEQlcDoU
I encourage everyone to read about it if you're a person who absorbs info via text better.
Here's the Wikipedia entry: https://en.wikipedia.org/wiki/Modern_Monetary_Theory
It's worth a read. I wish there was a single volume "MMT for Dummies," but to get the full read on it, you currently have to read a bunch of different texts. I like the Wikipedia article because they include some of the critiques as well as the supporting arguments.
My take on economics is there are few theories that are universally applicable. Keynes is applicable to some situations as is Hayak and even E. F. Schumacher. The hard part is figuring out which theory is good for which situation (and how to tell if your assumption about applicability was wrong.)
What I find surprising about modern Americans is they really want to elect someone who has all the answers. FDR was somewhat famous for f*king up a couple times and changing course when the data didn't match the theory. We're so tribal these days we refuse to admit that even good leaders can get it wrong once and again and having an honest discussion about why the error occurred and how they're going to fix it might lead to better outcomes.
I am reminded of J. R. "Bob" Dobbs' quote "Act like a dumbsh*t and they'll treat you like an equal." Perhaps I should run for office on the platform of "I'm probably as dumb as you are, which makes me smarter than my opponents."