Matt Damon has taken on the role of Santa Clause in this video. No, it's not for a new movie, it's for a cause--clean water. According to Water.org, which is the website displayed at the beginning of the video, the organization was co-founded by Damon and Gary White. And, according to the 'About Us' on the website, "Water.org is a nonprofit organization that has transformed hundreds of communities in Africa, South Asia, and Central America by providing access to safe water and sanitation." If you would like to learn more about the cause, click on the link above. Check out this video. It's pretty funny.