In my previous article on how to enable Windows Dreamscene and play videos as desktop background. I had promised to tell you how to add custom videos to your desktop. It’s pretty much simple.
Here are the steps involved.
Step 1) Right click on the desktop.
Step 2) Select Personalize.
Step 3) Select Desktop Background
Step 4) Now select Browse button on the right hand side of the dropdown box
Step 5) Go to the video that you want to add as your desktop wallpaper.
Step 6) Select Ok.
That’s it. Now your favourite video should be playing as your desktop wallpaper.
@rad
Hey I guess you didn’t read the previous post. It said that it works only on Windows Vista Ultimate.
And as for Home and Business users you can check out DeskScapes.
You can come back here in some days I hope to have an article on DeskScapes soon enough. 
Hey it doesn’t work for me…I’m using Vista Home…
Boy that was easy..I really thought we have to install some new s/w called Dreamscene 😀