OK, what else do you suggest? Not voting? That just speeds the process up. Voting for the small but much better option? In a FPTP voting system (like the American one that I assume you're talking about), the spoiler effect means that's as good as not voting.
This is my issue with the leftist community in general, and especially the ml group. Because of idealism, they seem to ask for something that doesn't exist and not accept anything else.
As good as that video is, he ignores the strength elections have as damage control. Yes, large positive change needs the sort of efforts he's describing, but ignoring voting means a bad government will have far more opportunity to undo progress.
Really, the biggest takeaway from that video is that there are more tools than simply voting and protesting, which I don't think anyone is disagreeing with.