Aerial is a macOS screensaver that lets you play videos from Apple's tvOS screensaver.
You can watch classic Aerial videos shot over various cities and locations (New York, San Francisco, China), Earth videos from the ISS, and the new underwater videos introduced in tvOS.
Aerial also includes videos from 3rd parties that kindly shared them, and you can now add your own.
Aerial is entirely free and open source. You can follow its development here on GitHub and participate if you want. You don't have to be a developer; we always need help with translations in various languages.
Aerial is also available for Windows.
Similar: How to Use Screensavers in Windows 10 & 11 How to Open, Customize, Download and Install Screensavers in Windows 10 & 11 How to Disable Screen Savers on Windows 10 & 11 How to Create a Screen Saver Settings Shortcut