Will a live wallpaper drain my MacBook battery?
Only minimally. Wallper pauses playback on battery by default and resumes when you plug in.
By default Wallper detects when you unplug your MacBook and pauses the video, replacing it with the paused frame as a static image. You can opt out of this behavior in Preferences if you want playback to continue on battery.
Even with playback on, the hardware video decoders on Apple Silicon are extremely efficient. In our internal testing a 4K HEVC wallpaper added roughly 1–3% to background power draw compared to a solid‑color background — comparable to having a Safari tab open.