In the computer client with a web browser to open the connection you copied and shared, this time requiring WeChat scanning code to confirm, follow the prompts to confirm it.
Open the video again in the computer browser, this time you can watch normally, F12 or use the browser to bring up the developer management tools, find the source code (or the right mouse button - view source code), search for find .mp4 files can be searched to the current video source address.
Of course, if you have installed a download plugin such as iDM in your browser, it will automatically recognize it.
Add the searched address to the download address and you can start downloading.