The sole point I was attempting to make was that the kid did this intentionally with the hope that he could goad the cop into screwing himself. He succeeded.
Then I guess the only point where we disagree is that I consider it utterly irrelevant whether the kid deliberately set him up or not. If all it took to "set him up" was to obey the law, but be a little prickly when questioned about that, then Occam's Razor leads me to conclude that this cop had a history of abusing his power, and quite possibly falsely charging people and getting away with it. He comes very close to saying that on the tape.
Now, I've been questioned by cops when they saw me alone in the wee hours. I tend to be polite, and considered it a conversation, not an investigation, and it never went further than that. I wasn't even asked for ID. Maybe Drew could have done the same thing, but I think we've all read enough by now to realize that both he and the cop came into this with some history. Drew's history led him to believe he needed to protect himself by videotaping his driving. The cop's behavior on the tape suggests that Drew was right.
Personally, I'm glad that cops have recorders in their cars, because I think it protects me from abuse - or at least provides evidence of it later. And I don't think good cops have anything to fear from civilian cameras, no matter what the motivation of the cameraman.