Douyin Assistant is a tool for downloading and managing Douyin videos. The usage is as follows:

1. Download and install the Douyin Assistant application.

2. Open the Douyin application, find the video you want to download, and copy the link address of the video.

3. Open the Douyin Assistant application, paste the copied video link address, and click the "Download" button.

4. After waiting for the download to complete, you can view and manage the downloaded videos in the application.

It should be noted that Douyin Assistant can only download public Douyin videos, and cannot download videos from private accounts or videos that have been restricted from downloading. In addition, according to relevant laws, regulations and platform regulations, unauthorized downloads of Douyin videos may pose a risk of infringement. It is recommended that you carefully read the platform regulations and relevant laws and regulations before downloading.