You share it by attaching it to any email. It's a fairly small file (665 kb)
If you want to rename it, do so with whatever name you want, as long as it ends with .wmv
If you want to post it on your google site, you'll be able to link to it directly from here by right-clicking and clicking 'copy shortcut", which places a link on your clipboard. Go to your page and make a link which the URL is pointing to the shortcut. Same way I did the link here on AJ.