I've read different opinions online, but they always seem to talk about stills. So, is NR useful for shooting videos? Or does it mess up with the image too much?
I'm shooting on a Panasonic Lumix G7, by the way.
My general rule is to do as little in the camera as possible (exposure, shutter). Leave everything else for post. It's not expected that the camera will have the best available NR or compression etc, and if you do it while recording you can't undo it later.
Of course if you'll never do any post, do what gives you the best result.