The guy taping the officer is just a jerk who was trying to instigate trouble. Those kinds of people get off by pushing the envelope as far as they can and then standing behind the constitution for protection.
"Tolerance is the Virtue of a man without Convictions" G. K. Chesterton
Considering the fact that the victim is the first one at the scene of a violent crime, I believe all law abiding citizens should be armed.
"Fast is fine, Accurate is final." - Wyatt Earp