Nope… but he explained it correctly.
the final production movie, the Swf, will be larger or smaller only depending upon what items are actually included on it’s stage, at any point in time.
That’s probebly all you need to know right now.
for later, keep this in mind.
There is a feature called attach(); which lets you draw stuff from a library. The library is a specially prepared Swf movie, and it might be required that it be on the same server that the movie Swf is located on. The library is created by having an item in it which is predefined in the “Library Panel”'s properties settings. “export” is the name of that setting.
The movie is then published, usually with nothing on it’s stage. Any animation is useless since it’s just a library, and will only add k to the production.