1. First, we open the watermelon video in our mobile phone, and then click the three-point button at the lower right of the video we want to download, as shown in the figure.

2. Then click Offline Cache in the pop-up window below, as shown in the figure.

3. Then a login interface will pop up. We can click on WeChat to log in, or choose QQ or Weibo to log in, as shown in the figure.

4. After logging in the account, we can download the video. We can choose two resolutions, but the high-definition cache will consume more traffic, as shown in the figure.

5. Then we enter the personal interface and click Offline Cache, as shown in the figure.

6. After that, you can see your saved video in the offline cache interface, as shown in the figure.