Summary

This hour didn't contain a lot of new material. You already knew two big concepts: how nesting of symbols works and how symbols can be used for both motion tweens and efficiency. When doing motion tweens, maybe you tried to make a symbol a multiframe symbol. Now you should understand that you can do that and there are options about whether the multiframe symbol you're tweening is behaving like a movie clip or a graphic.

You can't scrub when using movie clips or at least you won't see them animate until you run Test Movie. This is another reason to avoid using movie clips when you really need the capability to scrub such as for lip synching. Finally, the fact that only movie clips can be given an instance name will prove, in the long run, to be the most significant attribute of movie clips.