“Last year, Burger King launched an ad campaign that included television commercials featuring a “letter carrier” singing about breakfast at Burger King rather than delivering the mail. USPS objected to the commercial, resulting in a negotiated settlement favorable to both sides.” PostalReporter posted the video on this site last year but it has been removed. But it seems that USPS missed another Burger King video on YouTube featuring a letter carrier. The letter carrier in the video is giving his mailbag to a customer so he can join others in singing and marching to Burger King for breakfast.
Here is the video