TikTok is a short video sharing platform that allows users to create and share videos with music, dance moves, and other creative content. To download TikTok videos, you can use third-party apps or websites that offer the ability to download videos from the platform. Here are some steps to follow:

1. Download an app: Download a third-party app such as TikTok Video Downloader or Save From TikTok that allows you to download videos directly from the TikTok app.

2. Open the app: Open the downloaded app and log in with your TikTok account if necessary.

3. Search for a video: Find the video you want to download by searching for it in the app's search bar or using the search filters provided by the app.

4. Select the video: Once you find the video you want to download, select it by clicking on it.

5. Choose the format: Depending on the video quality you want, choose the appropriate format for downloading. Some apps allow you to choose between different resolutions, while others only offer high-quality options.

6. Start downloading: Click on the "Download" button to start the download process. The app will automatically save the video to your device's storage or provide you with a link to download it manually.

7. Check the file size: Once the download is complete, check the file size of the video to ensure it meets your requirements. If not, you can try adjusting the resolution or format settings to get the desired file size.

8. Enjoy your video: Once you have downloaded the video, you can play it on any device that supports TikTok videos.