What is the format of mac dynamic wallpaper?

Mac dynamic wallpaper is not an animation like a video, but a wallpaper that changes constantly according to time. For example, in the morning, at noon and at night, the wallpaper will automatically switch to display different styles.

Recommend several groups of dynamic wallpapers.

Wind blowing through the desert heic dynamic wallpaper? Web page link

Spacecraft dynamic wallpaper? Web page link

Spacecraft dynamic wallpaper

Chile Atacama macOS dynamic wallpaper 5K quality? Web page link

Makoto Shinkai style small fresh animation dynamic wallpaper? Web page link