He didn't feel safe because he was worried about her safety and there being a problem most likely. I'd be willing to bet that's what was initially going through his head when he asked her to go inside. Not everyone articulates properly when in uncertain situations (see: anytime a cop does pretty much anything) and this was likely a misunderstanding.

That said, he could still be worried about his safety just because someone is filming him. This isn't Iraq or Afgan, but I know our military forces DO NOT like being filmed by locals since it usually means some shit is about to go down. Who knows, maybe this chick was told by her gangster boyfriend to film as they drive-by the cops so they have some rep to spread around.

I'm 100% behind what the cops did. Hell, even if they exceeded their bounds a bit they SHOULD have taken her to jail just for being a pretentious cunt. Her attitude was TERRIBLE.