Tutorial: Video Wallpaper on KDE Linux
How To Set Up Video Wallpaper On KDE
This is actually a very simple tutorial.
First right click on your desktop and click "Configure Desktop"
Then click "Get New Plugins"
Search for Smart Video Wallpaper on the search bar on the right if it isnt there at the top.
Click install.
Once installed close then reopen the "Configure Desktop" window with the steps above.
Now click "Wallpaper Type" and select "Smart Video Wallpaper"
Now click video path and pick a .webm file (these work best). This is the best one I have tried since You can enable audio as well. And change when the Video pauses (when the desktop is being used or when there is a full screen window).
And now you have video wallpaper for free (haha steam)