I have a scenario, I have 2 large movies..that need to play back to back. I have the first 1 preloading 3 levels of the 2nd 1. I have the 2nd movie preload itself 40%. In this situation, do I need the 2nd movie to preload 40% or is it reloading so of itself again?

Also,
What does the play movie command do? Is it playing the next movie? No understand....