It's a paid application that you can install on Windows to get live, animated wallpapers ... a free, open-source alternative that manages to achieve a lot of the same things that Wallpaper Engine ...

Lively Wallpaper Is Free And Easy To Use Wallpaper Engine may be the most popular option for building animated wallpapers ...

and the only way to currently get animated wallpapers in Windows is to install a third-party app like Wallpaper Engine. Microsoft used to support videos as wallpapers with its Windows DreamScene ...