They’re pretty much sold on capitalism = bad and socialism = good but having more resources for that would be appreciated too.
CGTN has some great ones on China. Here's a couple:
Gay Leap Forward: LGBT in China
Not a documentary, but this is a great interview on life in the GDR from an American who lived there: https://youtu.be/Oy8CrizjKh4
Luna Oi is of course the best English language source on Vietnam:
How do ELECTIONS work in VIETNAM?
For Cuba, Azure Scapegoat has some good stuff:
Cuba: Before and After the Revolution - The Story of When Michael Parenti Visited Cuba (this one is EXCELLENT)
¡Las Sandinistas! is a pretty decent documentary of the Sandinista revolution in Nicaragua from women who were there.
Also, I haven't yet seen it, but Thomas Sankara: The Upright Man is supposed to be good.
The revolution will not be televised is an Irish doc that was being filmed about Chavez which then got stuck IN the fucking coup. So they have live reactions to the coup, the genuine fear of an ACTUAL coup that Americans freaking out over Jan 6 can't understand, some personal interviews with Hugo himself, though content warning, they get footage of several corpses and killings when the coup snipers fired into the crowd and the day after Chavez handed himself over.
https://www.youtube.com/watch?v=wF_5xZIstPw&t=1290s
I love how these Irish filmmakers pitched it to the ROI state agency for media as broadly-supportive of Chavez, and they got the go ahead. What english speaking country would do that? Hell European country not including the Union State would allow that? :chavez-salute: