Wallpaper Engine

Lively can be used to make a website your desktop wallpaper and a screensaver on Windows.

At this point you should have saved the animated wallpaper and extracted the .zip file into a safe location, that is hopefully not the Downloads folder so you won't accidentally remove it.

Buy / Download Wallpaper Engine.

You can find a guide on how to add your animated wallpaper in Wallpaper Engine's documentation (just watch the video).

You can also make it your screensaver using Wallpaper Engine. Read about that here.