I made an app which enables us to download TikTok videos by using API to extract the TikTok video URL to convert to a downloadable video. However, the AppStore rejected it because of Guideline 5.2.3 - Legal - Intellectual Property. "Your app allows users to save or download music, video, or other media content without authorization from the relevant third-party sources." In iOS AppStore, many video downloaders are listed such as tik saver, tiksave, video saver and so on. How do they release their video downloader? Can I get permission from TikTok for this? or these downloaders are illegal from now? If they are illegal why there are many apps on the app store?