Could you provide a specific point on the video the dog owner obstructed justice and or interfered with police?
The police officers knew he didn't obstruct justice. But he was blatently filming, holding the camera above his head, hollering at the police, agitating, challenging their authority.
The two police officers knew he would not have been convicted but he would be booked, spend some time in a cell, pay 10% of the bond, pay to get both his car and dog out of the pound. And would probably never film the police again.