Take it from a Canuck: s'alright to kill those things, even if your state/province would prefer you didn't. Useless, shitcrapping, overbreeding, nuisance species. www.canadianshatecanadiangeese.com
Hung paper bags keeps wasps away: they don't like to have hives beside one another. I suspect it would also keep a number of wasp prey species away, too. Evolution wouldn't be favouring those flies that come too close to a wasp nest!
I have some doubts as to it being the result of video framerate matching: it seems to me the maneuvers being performed would require the pilot to continuously adjust the rotor speed.
kthxbye.