Dan, I would ignore the people who tell you to stop using a video camera. I am sure that for them it's different, but for me having the video camera running makes it easier to shrug off the bad driving most of the time because I know I can deal with it later.
However, my own policy (nowadays) regarding what I do with the videos afterwards is that I rarely post the video on YouTube unless:
- I feel someone directly put my safety at risk, or
- it shows something that I might have found useful for own learning if I saw it from someone else, or
- it shows something nice and heart-warming, like a lovely ride out on a summer day, or a deer happily avoiding being squashed by a car.
I only report to the police if:
- the driving was sufficiently bad to scare me, or
- there is clear, deliberate bullying or aggression.
I'm afraid that someone using a mobile phone, who does not directly affect me, would not meet any of these criteria, though I might be tempted to submit them to Roadsafe if we had such a thing round here.
Regarding the response of the police officer, I think I would be inclined just to forget it. If the story is as I have understood it from your account, then he was certainly out of order, but is it really worth spending your time on and getting wound up about?