Setting Up Video Wallpapers on Mac (Method 1) However, the 4K Dynamic Wallpaper app allows you to use a personalized video or one you downloaded online as wallpaper. It’s worth noting that most wallpaper apps on the Mac App Store only allow you to choose from already saved videos or gifs. Go to the desktop page to check if the video wallpaper is set correctly.Congratulations, your Mac now has a live wallpaper! Adjust any additional settings, such as the wallpaper’s positioning, and then close the window. You will find several live wallpapers displayed on the screen, choose your choice and download it. If you downloaded it from a website, read the installation instructions carefully and drag and drop the wallpaper file into the designated folder on your Mac. If you download and install 4K Dynamic Wallpaper from the Mac App Store, simply click Open. Depending on where you download the live wallpaper app, the installation process may vary. By following these steps below, you will be able to enjoy Live Wallpaper on your Mac computer.