This incident took place on the south side of Milwaukee last January.
Police were called to a Walgreens near 26th and national because Brown was illegally parked across two handicap spaces.
The officers say they tried to talk to Brown but had to deploy their tasers to arrest him.
Since that time, the arrest has been the subject of a police internal investigation.
"I have some of the same concerns that the chief has expressed over the video. I'm going to let the release of that speak for itself, but yes, I definitely have concerns after watching that video,” Barrett said.
The mayor indicated that Police Chief Alfonso Morales had a similar reaction after seeing the video.
Brown was not charged in the incident. However, he did receive a parking citation.