FWIW, there's no great Russian conspiracy involving money at play here, in the sense that all Russia has to do is use its usual and visible soft power in the form of RT and Sputnik. They just have to concern troll western democracies, and repeatedly point out and amplify their very real failings to erode our societies. There's a strong (sometimes violent) anti-media feeling among YV that RT has been exploiting, to the point RT has been cheered by "the movement".
(Using quotation marks here because as a decentralized movement, you won't find something 100% of them agree on)
Of course, the usual bad faith actors, some of them Russian backed, are supporting the movement, but as much as they're trying to fit in the picture, they're mostly cheering from the sidelines.