alt Hacker Newsi've used this plugin a lot, and it is nice, but a bit hit-or-miss. it analyzes all episodes of a show to start seeing a pattern in the beginning of shows, or checks chapters which my files rarely had. works well for most shows, but if a show has unique intros for every episode, it doesn't really work. also had trouble with 100% consistent intros, but i never really figured out why that happened.
kind of a 50% solution, works a lot of times but a lot of other times you still end up scrubbing. (also consider that if you install this plugin onto a large existing library, it's going to take a considerable amount of compute and real-world time to do complete it for every show).
That sounds like what I see with Plex, too. It definitely doesn't get it when the intros are unique. And if there's something later that's the same each show (an explanation of the game show, etc) it'll target it as the intro instead.
It's good most of the time, but not 100%.