KitKat is undertaking its biggest wrapper redesign since the brand came to market almost 80 years ago, changing the logo on more than 100 million packets to reflect the different ways consumers spend their breaks -- including one with “YouTube my break” branding. Some 600,000 YouTube break KitKats will go on sale with the aim of “helping people make the most of their down time,” according to Nestle’s marketing director for confectionery in the UK and Ireland, Lisa May.