Podcasting Is Praxis is not a big brain theory podcast but they're by far the best and funniest current events/general banter comedy podcast I've come across. I'm pretty sure they're mostly ML, they certainly channel a lot of the same energy as Hexbear does.

A People's History Of Ideas tells the history of the Chinese revolution in extreme detail and the guy doing it is a Maoist. If you are the kind of person who like to know the minutuae of how safehouses were operated in Shanghai in the 1920's this is the place to look. Interspersed with the revolutionary history episodes is the occasional episode on Gonzaloism or oral histories from people who visited China during the Mao years. It's good albeit a little dry.