The specific steps are as follows:
1. Open the app store, find and download the video, as shown in the figure below.
2. Find the cache, and you can view the cached files, as shown in the figure below.
3. Find the file management function of the mobile phone and find the path shown below. The red circle is the video cached by the potato mobile phone, my file/storage /SD card/potato/offline data/et743wqtv1i.