First of all engagement, interest, motivation and/or emotional tune is a pre-requisit for storing in long memory - if its movies or real events doesn't matter.
A movie in itself is static (looks the same at repeated viewings) and also the activity viewing a movie is a static - often seated viewing a screen. Whereas a real event in itself is dynamic (is typically not repeataed in exactly the same way) and the activity taking part in a real event is also dynamic by involving motion, interaction, communication and incorporating unexpected incidents or occurences.
Talking about similitudes according to an engineering model - geometrics, kinematics and dynamics - of course there are similarities in form, flow of motion and interacting forces. The differences are a higher number of associations attached to the memory through the lived dynamic experience of a higher variation of iinter-play between forms, motions and interacting forces of a real event.