Very simple noobish question

I’m trying to have two videos in a “FLVPlayback” thing in my library but when I try to bring it to the stage it tells me I have to create an instance of the SWF symbol and edit it’s properties in the parameters panel… I understand what it’s asking, just how do I do it?

After that, since I want it to be in a playlist (or one after the other) then how do I do that?

Thanks in advance for your help.