Copyright-free historical photo/video

Hello all,

I know "copyright" is a bit of a misnomer, but the question still stands. I will confess that I don't know much about Russian law regarding intellectual property.

I'm doing a personal research project about Russian history, and eventually plan to turn it into a video essay (Youtube). I've been struggling, however, to find free, copyright-free images/video. In the US for example, the Library of Congress has a bunch of that sort of stuff. Is there any equivalent in Russia? I could probably navigate my way around a Russian site if necessary.

I'm specifically looking for stuff in the latter half of the 20th century. Bonus points for stuff depicting war/conflict.