The One With The Prom Video (Season 2, Episode 14)
The plot is as follows: When Ross and Monica's parents bring over some of the latter's belongings, she discovers an old DVD of her and Rachel preparing for their senior prom.
When a television sitcom has an opportunity to go back in time and show what its characters looked like in a prior decade, it should make use of it. So get your perms and awful mustaches ready, because this one has it all. Or, more accurately, a younger, lovelorn Ross has it all. Despite the fact that Ross and Rachel are arguing for the majority of the episode, the first humiliating recording demonstrates how much he is and has always been, in love with her. Also, it ends with Monica discovering what amounts to a sex tape her parents recorded, so that’s hilarious.
Link: https://www.rottentomatoes.com/tv/friends/s02/e14
