Trying to get set a regular video as wallpaper on an iPhone won't work because iOS doesn't support it. But there is a hack that turns longer videos (more than 3 seconds) into live wallpaper.

How to set up the wallpapers and widgets that will make your Pixel more fun If it's been a while since you've gone into your Pixel's customization settings, it's time to dig in. David Nield ...

You can change the icons to custom images, set wallpapers for each Focus mode, and then rotate them regularly. While I prefer not to mess with the default app icons, I do play with wallpapers.

That’s part of the reason Android updates often include new wallpapers. However, Android doesn’t yet let you set one live wallpaper as your lock screen, and another as your home screen background.