My Latvia (1954), a short documentary on the Soviet takeover of Latvia, is well worth watching.
Operation Abolition (1960) recounts a House Committee on Un-American Activities (HUAC) hearing in San Francisco in the spring of 1960 and the efforts of leftists to disrupt it. It was widely distributed and presented by conservative and patriotic groups in the early 1960s and later picked up by liberal and leftist groups who saw it as an expose of anti-Communist "witch hunting."
“Milada” about the Czech politician Milada Horakova, who was murdered by the Communists.
The dumb asses on the Left always get HUAC mixed up with Joseph McCarthy and treat them as one and the same.
There was a really good Polish TV series called “Stulecie Winnych”, about life in a Polish village from WWI up to 1989, and they really captured what life was like in Communist Poland during the Stalinist years.