This post was originally published on this site
https://www.ft.com/__origami/service/image/v2/images/raw/https:/d1e00ek4ebabms.cloudfront.net/production/52f37de8-cdd5-4848-81e2-7983356e8d51.jpg?source=next-article&fit=scale-down&quality=highest&width=700&dpr=1Advertising bosses say Meta and YouTube will be ‘clear beneficiaries’ if the viral video app goes ‘dark’ on Sunday