Don't know about the other documentaries, but wings of Russia seems to be dubbed, for example:
I think it's part of the original DVD release and it was easy for him to upload (the accent hints that the narrator is a native Russian speaker). His other videos are mostly subtitled in Greek.
Just type "wings of russia bitnikgr" in youtube's search bar to limit the search within his channel and you get an episode list:
http://www.youtube.com/results?searc...l0.2.1.5-1l4l0
From that point on, you could also add "episode 10" or such in the search query to look for specific ones, in case you want to watch them in sequence.
Well worth watching if you ask me and it covers a lot of ground. There's probably roughly 15+ hours of footage there (18 episodes of 50+ minutes each).