Any videos on russian aircraft machine guns?

[Pruciak]

Searching youtube and I can't find any usefull videos about shvak, shkas or ub machine guns. Maybe I'm blind. Any leads? Found mg17 video from forgotten weapons but not on youtube. Would be cool to watch this sort of video about other aircraft guns that we use in the game. 

Edited October 17, 2019 by Pruciak

[Brano]

key words for search

ШВАК , ШКАС, УБ, пушка, пулемет