@Pamsings, I think it's the Mega Mask - Heart Mask. It's linked there, but looks like it just sold out right after this video went up!
http://store.scrapbook.com/hs-hs64548.html
It will be back in soon if you sign up for email notification.
Love, love, love this idea! I've just begun to combine stamping & scrapping, so this gives me even more options. What did you use for the masking? I don't see it in the "products used" list. Thanks!