The longest TV commercial (duration) is 13 hr 5 min 11 sec, achieved by Arby’s (USA) promoting the Smokehouse Brisket sandwich, and aired on My9 KBJR-TV in Duluth, Minnesota, USA, from 24-25 May 2014.

The commercial consisted largely of a single shot of a raw beef brisket being smoked over the course of 13 hours. At the conclusion of the smoking process, the cooked brisket was removed from the smoker, and a chef used the brisket to make a sandwich.