TBH in this case I think PlutoTV (who I assume issued the DMCA takedown) effectively shot themselves in the foot. The problem here is that if you were to take down a bunch of episodes of a TV show, those episodes would theoretically be ~500mb a piece which means re-hosting them would be non-trivial. However when you're talking about a 50kb text file that can be shared literally anywhere, far more people now know that this is possible and can find the list with any amount of digging.
If PlutoTV was smart about this, they would have kept their lawyers out of it and had their engineers quietly patch this.