But where do you see "intent to violently usurp" in that footage? That's inaccurate and over the top rhetoric of exactly the kind you call out earlier.
I don't believe false flag. There may (or may not) have been agitators who were other then Trump supporters, but if so it wasn't too hard to do and a large number of Trump supporters behaved criminally. No argument with that. But it was not an "attempt to violently usurp the government" by any reasonable definition.