>at the time I was still buying into his B.S.

Why do you think it's BS, out of interest? I'm not too familiar with the man himself, though I am familiar with main social anarchist and Communist thought.

>Here's an interesting excerpt from a Chris Marker documentary

Chomsky does not support the Soviet Union, and to my knowledge never has. He also has no sympathy for Marxism-Leninism. He's more of a syndicalist/social anarchist, so the video doesn't really fit in so well. Unless he used a propaganda video himself, which would surprise me.

Chris Marker is a french cinematographer. His works is unregular but this documentary (Letter from Siberia) is great. (Also, he is the author of the photo movie La Jetée, here in english https://vimeo.com/46620661, which inspired the movie 12 Monkeys !). He has communist leaning from what I remember but it doesn't feel like he's using cinema to convince you about his political beliefs, and he doesn't defends USSR, although he is culturally very interested in this country.

This excerpt is about media manipulation if you didn't understand it, it shows how it feels to change the voice over and keep the same images.

  Why do you think it's BS, out of interest? 

Sorry I wasn't talking about this documentary, it's not that bad, what he says in it is pretty obvious.