I have yet to meet a single pro-Russian leftist in my country. Or a tankie. Sure, shit like lemmygrad, r/communism, etc. exists, but you have to go digging pretty deep to find those people.
Most leftists I know, even those who identify as socialists are pretty much in the "yeah, fuck Russia" camp. To the point that they openly advocate financing Ukraine.
This video is blatant propaganda piece, and not even truthful at what it tries to be.