Is using the Freeman on the land method poor in this regard yes.

Was the guy wrong? No.

There's no reasons for them to deny a camera in there, it's a public area. They could ask him to only film where relevant (IE in private discussion, not the corridor).

Instead they used damaging force simply because they had no recompense.

It's neither parties fault really though as it shows the conflict between laws , rights and regulations.

They have "policy" to follow, with intent to protect other citizens, the problem is that policy is now corrupted and doesn't protect citizens, it protects ego and "power".

He's right in that the only reason they don't want him recording, is because they want the freedom to do bad shit with impunity. He would have still been tased and likely given a pasting too. Then conveniently the camera footage wasn't recording that day or hasn't worked in a few weeks.

And all because they don't know how to deal with a situation nor reconcile their double think between their indoctrinated training and actual rights.