DreamScene Seven is a utility for setting video wallpaper in .wmv or .mpeg format as a desktop background.
Some versions of Windows Vista had an effective function called DreamScene. It allows to set video wallpaper, instead of this Windows 7 has a wallpapers slide show. In order to reveal the opportunity to use this function again, one may try this common utility
After the program is downloaded, it is necessary to run the file with administrative privileges (right button click is the run as Administrator).
Then you have to select the button Install DreamScene.
Now a new item "Set as Desktop Background" will appear in the Video File Context Menu, with the help of which it can be set as a desktop background. So it only remains to visit DreamScene gallery and choose an appropriate video clip for the desktop, there is definitely a wide choice - more than hundred of selective scenes.