What he is being charged for is calling police officials and others on the phone after this, and recording the conversations without getting the other parties permission to record the phone call... Then posting those recordings online.
This is how 95% of these stories are. Facts are hidden, what happened is misrepresented; stories to fit narratives are made up.
Don't get me wrong, if you call an on-duty police official at the police station maybe they shouldn't be given/expect privacy, but this story makes it seem that this guy is being charged for posting the mentioned video. Clearly he is not.