Well, when a cop tells me to take my hand out of my pocket I usually don't say "No sir." Regardless of who started what, you just don't keep your hand in your pocket when a cop asks you to take it out. To me, the guy was quite confrontational and appears to be attempting to goad the cop into doing something. Given just that video, and having nothing else to go on, on a jury, I'd lean towards the cop in that situation.
Looks like almost a toss up to me. Both people are a couple of sandwiches short of a picnic. But the real idiot is the guy trying to provoke the officer.
There was a case in Boston where a guy filming police was arrested. The state Supreme Court affirmed the right of citizens to film in public, and defined policing as a public activity.
I have a relative in law enforcement and he's fine with people videotaping him as he believes it will typically help defend his actions. He was baited and videotaped by some protesters his first week on the job.
Think the guy is a tool but I am glad people are out there challenging the limits of LEA actions versus citizens. It takes two to tango but while the LEO drew his gun he did not aim it towards him and that strikes me as a "No harm no foul" situation.
If you were in Boston after the marathon shooting and saw 7,000 officers, most armed with long arms, restricting movement in the search for a single wounded teenager, you'd be concerned as well. The irony of said teen being found by a private citizen after the " Shelter in place" order was revoked is acute. That they riddled the boat with bullets should give pause as well.