alt Hacker NewsDefamation is the most boring version of this case. Barring dishonest editing, of course it's fine.
There are hypothetical versions of this that get more interesting. Ohio is a one-party consent state. It's not clear what happens in a two-party consent state. Law enforcement has no expectation of privacy in public spaces. Private is "it depends," think cases where low enforcement is discussing something with one party in a domestic dispute. If he had used bodycam footage, then you get into interesting copyright laws. Is it public domain, and if not, is it sufficiently transformative to qualify as fair use (think April 29, 1992 by Sublime).
> If he had used bodycam footage, then you get into interesting copyright laws
Not that interesting. The US government cannot create copyrighted works. Works created by the government are public domain. This is why Ghidra (made by the NSA), for example, has a really odd license, where the parts written by the government are "not subject to U.S. copyright protections under 17 U.S.C.", whereas future contributions by the public are covered under the Apache license.