I learn something new every day. For example, I just learned that, in Marine parlance, a "jody" is a man who sleeps with the wife of a marine who's away on duty. Of course, as Urban Dictionary suggests, the term may have uncomfortable racial origins, so I shouldn't get too comfortable using it.
The jody in question in this video is the fully clothed guy confronted by a returning marine who discovers the man doing...something...with his naked wife while she's....sitting on the toilet. So, yeah, definitely inappropriate, though I'm not sure they were engaged in actual copulatory cheating at the time.