Describe the lock feed in the background manual

manual/39-backgrounds.md

@@ -4,6 +4,6 @@ Every theme ships with its own set of backgrounds, and you can add extras of you
 
 You can do this most easily by going to _Install > Style > Background_ in the Omarchy Menu. That'll bring up the folder where the backgrounds for that theme is stored. Hit `Super + Shift + F` to start another file manager, find your background, copy it over.  Now it'll be included in the choices of backgrounds you can select between using `Super + Ctrl + Space`.
 
-Backgrounds can be videos as well as stills. Drop an `mp4`, `m4v`, `mov`, `webm`, `mkv`, or `avi` file in the same folder and it appears alongside the images. Videos are played by the OWE wallpaper engine. It decodes once for every monitor and plays the video's sound through the default audio output, and it stops playback whenever nothing can see it. The lock screen keeps its own silent playback. A video wallpaper still costs far more power than a still one.
+Backgrounds can be videos as well as stills. Drop an `mp4`, `m4v`, `mov`, `webm`, `mkv`, or `avi` file in the same folder and it appears alongside the images. Videos are played by the OWE wallpaper engine. It decodes the video once for all monitors and plays its sound through the default audio output, and it stops playback whenever nothing can see it. The lock screen draws the same decode, muted, through OWE. A video wallpaper still costs far more power than a still one.
 
 You can find a huge collection of cool curated backgrounds on https://github.com/dharmx/walls.