Yes, playing video continuously uses energy. But how the app plays video matters enormously. Software-rendered wallpapers can burn 5–15% CPU. MacWall's hardware decode on Apple Silicon typically stays under 1% when plugged in, and zero when pause-on-battery kicks in.
MacWall's power-saving features
- Automatic pause on battery
- Pause during full-screen apps (video calls, games, Keynote)
- One hardware decoder per display, no duplicate work
- Preload off until wallpaper is visible
Practical advice
On a MacBook Air, keep pause-on-battery enabled. On a desk setup, enjoy 4K loops freely. Use the menu bar to pause manually during long unplugged sessions.