That's a good one, Jim!

Jim's story has a sort of punch line, with a bit of a moral in it(embarrassed for videoing sex), as well as a slightly inexplicable causality (after the story is over, you realize that playing a video on your TV won't broadcast over a communal aerial, but it sounds good for just long enough to get the desired response). These elements make it a classic urban legend.

Aunt Peggy's story doesn't have a punch line or payoff, like the man returning to his favorite chair in the Roald Dahl story (sorry Mr. Red, you've been foafed) so it is kind of incomplete, as far as being an urban legend.