I'm willing to bet those squirrel(s) have rabies. It's not common, but they still can carry rabies. Squirrels can carry tons of disease, rare, but still can. The black plague was found in a squirrel in colorado or somewhere just last year if I remember correctly.

Also funny, those traps in the video are for mice, a squirrel can't manage to fit it's ass in those tiny cages.

Also a good reminder, wild animals are just that, wild. That idea is totally lost in today's society with all the snowflakes.