[Chinese version of TikTok limits use of app by those under 14] Chinese short video app Douyin, the Chinese version of TikTok, said on Saturday that all of its authenticated users below the age of 14 will now access the app in a “youth mode”, in its push to shield the young from inappropriate content. In the youth mode, under-14 users can only access the app for up to 40 minutes a day, and only between 6 a.m. and 10 p.m., Douyin, owned by Beijing-based ByteDance, said in a statement. The measure to protect the young was the most stringent…