I'm unsure exactly what you mean. If the animations are very short, preloading shouldn't be a big problem. It sounds from your description like Movie 2 takes longer to load than Movie 1 takes to run.

You could preload all the movies at the start, using the hidden-container approach. Or when movie 1 is started, preload all the rest. (If you're unsure which movie will be played first, that's harder to arrange.)