Ah yes, I know that feeling. I have done that myself in the past. I remember being surprised after reading a book and finding clarity in a key point, and thinking, wow, I had it all back to front.
Movies are great entertainment, there is no doubt about that. They are an expressway to the city. Books are a slower trip through the hinterland. The ride takes a bit longer, but you see so much more. So it all depends on what works for you.
Thanks for your comment.