How to Use the Tree From Curves Script?

I can’t seem to get the script to do what I want it to…I can get the trunk, but I’m having trouble getting the branches and leaves.
I downloaded the video on the blender wiki, but I can’t seem to find anything that will play it?
so, could anyone tell me how it works? Or If anyone could help me find a program that would play the video, that might be just as good.

Thanks!

Lanky_Luigi86

VLC for example plays oggvideo.
http://www.videolan.org/