Gotta be careful with Youtube videos, many are just idiot amateurs giving bad advice.Watched a youtube video about changing plugs. Suggested putting motor oil on the threads. Cant say I agree with that. Maybe some Anti-seize?
If you put antiseize on the threads, just make sure to only put a very small amount onto the threads and make sure none of it can get onto the electrodes during the install. Antiseize is conductive so it will really screw things up if it gets onto the electrode.