TIKTOK IS ONE of the world’s most popular social media apps, with over 1 billion users drawn to its rapid-fire video stream and huge array of content. But it’s also one of the most controversial apps, given its Chinese ownership (it’s run by ByteDance, which also has many other apps which are only available in China), and concerns about what it does with its data. Last week, the CEO of TikTok, Shou Chew, was questioned before US Congress about the app. While some of the questions centred around user behaviour, many other questions were about the ownership of TikTok, what…