Nice video. I had a hawk land right outside my window after a chicken. Had to run out and scare it off. I found that shot gun blanks work well as a deterrent if you are in a location that you can use them. They don't like the noise, it's effective at a distance or when they are in the air. and after a few encounters often avoid the area, and of course it is illegal to kill them. It looks like you don't even need to bother with deterring them.