Well, to make a flash video, you need Macromedia Flash(Director also works, but Flash is better for videos and Director is better for websites in my opinion). I don't know of some big formula to put into something free yet that could make it. You'd need to get your hands on and learn how to use one of those programs.
...Oh, and I believe they're adobe and not Macromedia now. Gah...stupid companies buying everything out.. As is, I can make them! But I wont have much time coming up to do extra projects.