So I found out after talking to some people that the cameraman "Jeff" may be the same guy that has been throwing rocks at windows of businesses (sometimes breaking said windows) at the same intersection in order to set off the alarm and then film the police when they show up to check the alarm.
If I was just out filming and anyone asked me what I was doing I would politely answer giving the reason even if it is as inane as I liked the way this section of street looks in this light and photography is a hobby. If my intent was as Jeff's is stated "trolling for cops" behaving illegally, I would state that in the same manner, politely whether it it was a LEO or average joe blow. Of what are Jeff and his com padres afraid. I would not tolerate a LEO or anyone for that matter stepping on my rights. A lot can be accomplished thru calm polite discourse.