How to convert a swf file

how can I convert a URL swf file
http://www.vatican.va/various/cappelle/sistina_vr/index.html

Do a google search for "swf to avi." There are a number of free converters.

I think you should first download the swf file, then find a tool to convert the swf file.
You can try this swf convert tool
http://www.effectmatrix.com/swf2avi/index.htm