Walyro

Walyro is a live wallpaper app for Mac that runs on your own videos. Drop in an MP4 or MOV clip and it plays as your desktop background, up to 4K, with a different one on each display. Build playlists that rotate on their own and control everything from the menu bar or the Now Playing sidebar.

It's a native Swift and SwiftUI app, so it stays light: playback pauses when you go fullscreen and eases off on battery. Your library never leaves the Mac. No cloud, no account.

Free to download, with a one-time unlock for the full app. No subscription.