Putting aside that Dunkey's video was mocking people who don't remember stories and making a silly joke...
I, for real, can't remember the detailed plot of a single piece of media I haven't experienced multiple times. I've taken in thousands of stories of all mediums, and I could not tell you the plot or character details of most of them. I've written tons of fiction, got my undergrad degree in writing and film, and even wrote 200k words for a D&D setting, so I clearly care more about stories than most things.
Meanwhile, I can remember where everything is in a Dishonored level years later and find hundreds of clips for enemy combat across scores of games by my memory of exactly how every game applied its mechanics. My memory is experience-oriented -- i.e. things that I tangibly did or felt. I can remember how every story made me feel, even if I don't remember exactly what happened.
People's brains do indeed be working differently.
This is also why I hated history in high school and why I hate trivia games -- that's simply not how my brain stores information. For story memory, it's gotten to the point where I just have to wave my hands every time my friends ask me a question about "what happens in X?" or "don't you remember Y?" because I truly have told them too many times that, no, I do not know. Is it annoying that my brain works this way? A little bit, but I at least get the benefits of being truly surprised by the little details in the future if I rewatch something sometimes.
(And here I go storing more gas in my desire to interview creators on how their thoughts and memories work just to make it clearer that no form of thought or memory is "normal" (and this is not just a neurodivergence thing, it applies to everyone). This is probably one of the biggest topics of analytical conversation with other people in my life after age 30 that isn't dedicated to TV or video games.)