The software will allow you to set the wallpaper to run automatically on startup.
This is the most highly recommended, free, and open-source software. It allows you to set animated, interactive, and video wallpapers (MP4, GIF, YouTube links).
Lively Wallpaper - Free download and install on Windows - Microsoft Store Live Wallpaper For Laptop Free
A highly-rated free option on Steam. Sources for Free Live Backgrounds
Download a live wallpaper file (usually in MP4 or GIF format). The software will allow you to set the
Offers tools to create your own animated wallpapers using their stock images.
Install a free app like Lively Wallpaper from the Microsoft Store. and video wallpapers (MP4
Lively Wallpaper. Free and open-source software that allows users to set animated and interactive desktop wallpapers. Microsoft Store