System Version: Android 10

Software Version: Watermelon Video 5.8.8

To download your favorite videos using the Watermelon Video app, you can do the following.

1. Open "App Store", download and install Watermelon Video app.

2. After successful installation, open Watermelon Video app.

3. Find the video you want to download.

4. Click on the video to go to the play video page.

5. Click "Cache".

6. Click "Continue Caching".

7. Click "View Cache" to see the cache progress.

Summary: first download and install watermelon video, then open the watermelon video app, click to the video you want to download the playback page, click "Cache", click "Continue Caching", and finally click "View Cache". "You can also download the video from the website.