US President Donald Trump said he may ban TikTok, a popular Chinese-owned video app that has been a source of national security and censorship concerns. ByteDance launched TikTok in 2017, then bought Musical.ly, a video service popular with teens in the US and Europe, and combined the two. A twin service, Douyin, is available for Chinese users. TikTok’s fun, goofy videos and ease of use has made it immensely popular, and US tech giants like Facebook and Snapchat see it as a competitive threat. But its Chinese ownership has raised concerns about the censorship of videos, including those critical of the Chinese government, and the potential for sharing user data with Chinese officials.