TikTok voluntarily shut down service. However, the social media app still gave users the option to download their data.

To download a video on an iOS or Android device, go to your TikTok profile page, select the video you want, and tap the Share button on the right side of the screen. Then, choose “Save video.” ...

Now you'll request your data. You can download all of your data, or you can specifically only download your Profile and posts, Activity, or Messages. Click request once you've decided how to move ...