On the face of it this vid does demonstrate one thing.
Using the down wash from an A*/Squirrel isn’t effective in dispersing what look like a fairly placid bunch of protesters (they look like they’re just stood on the land - not hunkered down or rioting). This is defo not gonna work on a more motivated bunch of actual peace threatening rioters.
So yeah - bring a Merlin next time fellas.
Better yet - just let them stand there, get real police to deal with the dispute, and save your machine for more suitable activity.