How to make a custom video as Desktop Wallpaper/ Background - OSX Tweaks 2017
Sharing with you an awesome tweak and trick to make it work
1. Install Mach Desktop App from App Store.
https://itunes.apple.com/in/app/mach-...
2. Start it from the Applications folder.
3. Go to Applications, select "Mach Desktop free", Right-click and "show package contents"
4. Navigate to Content - Resources folder and Replace any Movie File with the one you want to play in the background.
5. Select the same file from Menu - Wallpaper preferences pane.
Play your own Video in Desktop Wallpaper!
Works in Mac OS X El Capitan, macOS Sierra, Yosemite