See it from another angle here.
YouTube commenters write: "i teared up a bit there" and "why all men aren't like this one? so unfair." Unfortunately, there is at least one hater. Blogger Ned Hepburn for urlesque.com posted "Ten Signs the Adorable Wedding Proposal Dance Is a Fake Viral Video." He even mentions Vassar, sort of: "Their names are Woodrow and Claudine. I'm sorry. Where did they meet, at Whitey McWhiterson's School of Silly Upper-Middle-Class Names? Give me a break."
Another Vassar filmmaking alumnus did a public proposal two weeks ago. Mark Rosenberg '97, the founder of the popular festival Rooftop Films, proposed to his girlfriend in front of an audience of hundreds.
Update: Even The Guardian picked up on the clip, calling it "the Glee of wedding proposals."