Posible exculpatory evidence is supposed to be made available to the defense as soon as it is known/discovered. Going into court in ordr to get the evidence shows malicious intent on the part of the prosecution.
Putting a gag order on the videos can be seen as preserving the defendant's right to a fair trial because viewing the evidence might otherwise influence a jury. Except this is a Class B misdemeanor that will be heard in front of a judge.
Once the material is entered into the case file it becomes part of a public document. Putting a gag order on it suggests preferential treatment towards the county and the officers in order to shield them from public embarassment. If the case tirns out as everybody is suggesting it will, there will be no shield large enough to protect them from intense and long-term public ridicule. It's like pulling off a bandaid - do it fast and get it over with or do it slowly and suffer longer.
stay safe.