I was unaware that Mosfilm was based in Istanbul. I don't have the bandwidth to check the films out, but memories of screening 16mm prints of some of the early Mosfilm films to a small film society of dubious "fellow travellers" in Sydney, Australia came to me. From memory some of the Eisenstein films were produced by Mosfilm.
No it's not spam - Mosfilms also recently uploaded most of their catalogue onto YouTube - not the best viewing experience but a great way to see some classics before buying the full DVD. Recently watched Tarkovsky's Ivan's Childhood. Excellent stuff.
Link: Mosfilms YouTube Channel.
One quirk is the subtitles are under the screen and are activated using the button named 'Interactive Transcript' - you get used to it!
I discovered that Mosfilms had done this recently, it's really great. My wife liked watching Moscow Doesn't Believe in Tears which she hadn't seen since her socialist childhood.