Around 11:50 she says "scared of a female - I was trying to sign the fucking ticket", suggesting that she considers that some action she performed was something he was scared of. I guess this was the reason he asked her to get out of the car.
She says "I can't wait until we go to court" refuses to stand still, refuses to listen to his responses, refuses to stand in view of the camera where he tries to put her. At 8:58 when he notes explicitly she seems "very irritated" I'm assuming, and with the subsequent search, that he's considering she's hiding something that warrants further investigation (like drug-driving?).
>His own needless power-tripping prolonged the stop. //
It doesn't seem like this to me. Assuming the stop was valid - and in none of the footage did I hear her say it wasn't - then what should he do, just ignore the ticket because she won't comply?
From a sister article (http://www.latimes.com/nation/la-na-sandra-bland-arrest-expe...):
>"In hindsight, [Retired Los Angeles Police Capt.] Meyer said, it may have been better to wait for backup. “The lady seemed committed to her resistance to lawful detention and arrest, so the presence of a backup unit might not have made much difference,” he said.
“This is yet another case of someone who chooses to illegally resist the directions of a police officer, thus escalating the situation, “ he said." //
That's exactly how this reads to me.
If he had said "this is just a warning, there's no fine or penalty" (as he did with the first woman) the stop would hae been very much shorter.
His own actions prolonged the length of time that he was standing in the road. His own needless power-tripping prolonged the stop.