Every time I’m reading about Aphantasia, I’m confused again that people really see stuff in their head. I have basically the same as the person in the article. So, if you want to know anything, AMA. I’m also trying to respond to a few questions which are already asked.
That's said, I imagine if you rewatched a recent movie, you would recollect every scene during the act of rewatching, just like someone without aphantasia.
For anyone who has a hard time believing this condition is real (because I initially did) here's how I think about it. When I first learned there are people who are color blind, I was stunned and skeptical that I could be looking at a certain colored flower and someone next to me didn't see the same reality. I can also easily believe that someone can imagine something in their mind way more vividly than I can. I'm willing to bet you could do an experiment where you give various people step by step instructions to do origami in their mind, draw a top-down view of the final shape, and there'd be a wide range of accuracy even among people without aphantasia.