Platforms TikTok Tightens Up Privacy Settings for Users Under 18 The video creation app’s Duet and Stitch features are only available to people 16 and older Videos can now only be downloaded from creators 16 and older Anatoliy Sizov/iStock By David Cohen January 13, 2021 TikTok Wednesday implemented several privacy and safety measures aimed at protecting its users under the age of 18. David Cohen david.cohen@adweek.com David Cohen is editor of Adweek's Social Pro Daily.