both parties acted incorrect in my opinion, but I do agree. The video seems like it is obvious there are two sides to the story(though the man arrested and his wife try to 'paint' it the other way).
I will say this though...that internal investigation will include a clear video of the event to the cop's supervisors. It will be very telling, so it is bad for him no matter what happens if the cop is shown losing his cool and/or acting inappropriate in any way.
"Damn the torpedoes, full speed ahead!" -Admiral Farragut @ Battle of Mobile Bay 05AUG1864