Beau is Afraid was the last one I recall. I think it was mostly the latter half of the movie where I started to get a bit confused and needed the ending explained to me.
What movies made you look up some kind of explanation afterwards? I feel like I have done it several times in the past for more surreal movies but can’t think of any other examples.
It can also be a TV show.
I didn’t exactly need the ending explained, but Everything Everywhere All At Once has so much going on that I got really hyper focused on looking up commentary for everything in the movie. There were a lot of things I missed so I found it really valuable beyond just wanting to deep dive every little detail haha.
Surprisingly, after all the hype of Interstellar being incredibly confusing, I felt like I missed something because it seemed fairly straightforward (not the plot, which was obviously convoluted, just that I understood the ending). Then I looked up explanations of the ending and they fit my interpretation so that was a bit anticlimactic lol