Assuming you mean the actual Soviet Union, Chernobyl was incredibly well-done.

The Witness (A tanú in Hungarian) is a fantastic satire film about the life of the common man under Soviet socialism. It's required viewing for our literature classes. Watching it before learning more about the Soviet Union and Europe, and after, you pick up on completely different nuances of life at the time.

Go ask on lemmygrad. Kinda serious.

Might depend what you mean by ‘things’, there’s Chinese reality tv shows with English subs, an interesting one which got popular last year was about a local police station.

It was bizarre because it had cutesy graphics and sound effects overlaid with a guy being questioned for sexual assault of a minor

A good documentary, on the USSR though not modern Russia, is The Human Face of Russia. You can find it on YouTube. It's Australian as well so it's interesting seeing a look into the Soviet Union from the point of view of a country that is aligned with the US but without so much Red Scare propaganda.

There are quite a few documentaries about North Korea, they're not that hard to find, and they really amaze you when you watch them.

The Lives of Others is a movie about life under surveillance in the DDR. Maybe not quite what you asked, but it's very well made

TraumaZone

No commentary, just video providing a glimpse into a collapsing Soviet Russia.

https://www.theguardian.com/tv-and-radio/2022/oct/13/russia-1985-1999-traumazone-review-ingenious-essential-viewing-from-adam-curtis

If you want a fairly recent on the group English perspective then check out the YouTuber Bald and Bankrupt. China is harder as most YouTubers there are paid propaganda. Maybe check out YouTubers laowhy86 and serpentza as they lived in China for over a decade and then had to run. Interesting takes for all 3 above. What I find most interesting is that most of their criticisms can also be levied on their home countries if you can get past the fog.

Not a series but Death of Stalin is a super funny movie that is actually closer to reality than one might think.

A day in the life of Ivan Denisovich

Its a movie based on a book by Alexander Solzhenitsyn, about a man in a russian gulag. You can find it on Youtube.

Eh, it's heavily dramatized and was recorded in English but HBO's Chernobyl miniseries might be worth checking out if you're interested in things like one-party rule and conspiracies in authoritarian regimes.

TIL China is a one-party system with English subs

For a fictional world check out Fullmetal Alchemist Brotherhood.

Something like Hotel Rwanda or A Hologram for The King with a lot of general dysfunction and corruption might be worth a look too. People imagine a place like China has hyper-competent leadership in total unity for the evulz, but the truth is it's often the same depressing shit, just with the financing for a facade of modernity.

The Americans maybe? Although in USA but shows few things about USSR.