The third beta of tvOS 9.2.2 has just been seeded to developers. We find this release two weeks after the last one. In this version we see some minor bug fixes and improvements. Other than that, we’re not sure what’s new.
To get this version, developers can go to Settings > System > Software update > tvOS 9.2.2 Beta 3. If it isn’t yet installed on the Apple TV, you can get it from the Apple Developer Center downloads page.