I'm not sure why your link isn't working. I just tried it again to verify for a user in the private forum for Contact and the link works fine. Once there, enter your password to watch the video.
To download, you'll see a download link that will take you to Vimeo for the video.
If you have a 'download manager' program, you'll be able to capture the video directly from the "P3" site.
Thus, try again and use all lower case letters.
Yea, yea, I know...it shouldn't be cap sensitive, but, for some reason, it is. You'll get a "404 error" which is another subject completely.
Also, since you've purchased the trick, feel free to use the "My Penguin Magic" area of this site. See that big, green link up above at the top, center of this page. Click it and you'll be taken to a list of all your PM purchases with links to discuss the trick openly with other owners (no need to worry about 'keeping the secret').
Best wishes...