Looking at that video, I'm sorry but he's not going after that Cruze. The siren you hear before the video starting is not constant and instead follows the bell curve [doppler effect] meaning that there was another cop passing by that was chasing someone. Also, what cop takes that long to wait before going after someone with no traffic in sight?
On a side note, I lol'd at the fact that right after he made the ducks leave another Cruze passed right by him, not to mention the illegal pass the white Cruze made over a double yellow line, and yet he got no ticket. Gotta ask the question though, are there nothing but Cruze owners in Portland? Lol.