First, open the product link corresponding to the video you want to download, without clicking to play the video;

Then, right-click your mouse to enter "Inspect Element", at this time you will see a lot of code at the bottom of the page;

Then, press "Ctrl+F" on the keyboard at the same time, that is, to search the page, enter MP4 in the search box, and click OK.

Then, you will see a URL ending with mp4 at the location you locate, copy this URL.

Finally, open this URL on a new page, and you will see the video you want to download. Click the 3 dots at the bottom right of the video, and you will see the download button, so that the video will be successfully downloaded