This Burger King video came out last month in time to celebrate National ASL Day, and I'm giving it an A+. It hits all the sweet spots: on-brand, fun, meaningful, and emotion-inducing enough to have excellent viral/share potential. It also reflects positively on the brand in the community. (The store used for this is in DC, near Gallaudet University, which as you may or may not know is a private university for the deaf and hard of hearing.)
Bravo, Burger King.
Check it out: