Your video is from the UK. I can't speak for what goes on there. Likely right now, neither can you. But you can't tell me what's going on in the US better than I can tell you. Firstly, there are no Communists in the US and almost no Socialists. Basically just Bernie Sanders, and he's not dangerous. And there is no "unholy alliance" between AntiFa, BLM and left-leaning students. There is a Black Lives Matters movement, which has reasonable support amongst a lot of left-leaning people, not just students. As to AntiFa (Black Flag), I believe that it exists, as it has for some time, but I'm telling you I don't see them at marches. Their current influence might be exaggerated by the right, which is clearly trying to create an opposite to the certainly increasing extreme-Right presence here. They've been called the Alt-Left, which is not a thing. It's a construct of the right, which Trump is buying into. I have seen a lot of these modern leftist anarchists over the last couple of decades, mostly during the Bush years, in the anti-war movement, and at Occupy Wall Street. They are really not as much of a presence right now as then. I live in anarchy-central, here in lower Manhattan, they are not as much around or influential as you think they are. I have seen less of them than in the past. I think you're exaggerating their importance based on bad intel. Don't believe everything you see on youtube.