AI Wallpaper

Samsung Galaxy

Set a Video as Wallpaper on Samsung Galaxy

How to apply a downloaded MP4 as the lock screen video wallpaper on a Samsung Galaxy phone or tablet, with the limits Samsung's own Support article actually documents.

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Who this guide is for

You own a Samsung Galaxy phone or tablet, you have downloaded an MP4 from this site, and you want to set it as the lock screen wallpaper. Samsung officially supports video lock screen wallpapers on Galaxy devices; home screen motion and Galaxy AI wallpapers are separate features handled below.

What this site outputs

Live wallpaper generation here produces a 9:16 portrait MP4 or WebM with output options up to 15 seconds and up to 4K MP4. The actual file depends on the output setting you choose. This site does not install anything on the device and does not run inside Samsung Gallery.

Before you start

  • A Samsung Galaxy phone or tablet running a recent One UI version (the support article assumes the current One UI menu structure).
  • The MP4 saved to the device — transfer it via cable, Quick Share, or downloading it on the phone directly.
  • Enough free storage to keep the MP4 in Samsung Gallery (a few megabytes for short loops).
  • If you want the video on the home screen as well as the lock screen, an updated One UI or first-party Good Lock module (separate feature, not covered by this article).

Step-by-step

These steps mirror Samsung's official Support article on setting a photo or video as a Galaxy wallpaper.

  1. 1

    Download the MP4 from this site

    Generate or pick an existing wallpaper, tap Download, and confirm it lands in your phone's Downloads folder or Gallery.

  2. 2

    Open Samsung Gallery

    Locate the downloaded MP4 inside Samsung Gallery. If you saved it elsewhere, move it to a Gallery-visible album first.

  3. 3

    Open the video

    Tap the MP4 thumbnail to enter the playback view. Trim or crop here if your One UI version offers the option.

  4. 4

    Open the More menu

    Tap the three-dot More menu in the playback view. The menu surface is where Samsung exposes the Set as wallpaper action for videos.

  5. 5

    Choose Set as wallpaper

    Pick Set as wallpaper from the menu. The wallpaper picker opens, scoped to the lock screen target Samsung's Support article documents.

  6. 6

    Choose Lock screen

    Confirm Lock screen as the target and apply. The video now plays whenever the lock screen is on; double-check by waking the device.

If something doesn't work

No Set as wallpaper option in the More menu

Some older One UI versions or carrier-locked Galaxy ROMs do not expose Set as wallpaper for videos. Update One UI in Settings → Software update, or fall back to using a single still frame as the wallpaper.

Video plays only for a few seconds

Samsung's lock screen video wallpaper trims long clips. Re-crop the MP4 to under ~15 seconds before retrying.

Home screen still shows a static image

Samsung's Support article documents lock screen video specifically. Home screen motion behavior depends on the model and One UI version, and may require the first-party Good Lock + Wonderland module rather than the standard wallpaper picker.

Black or letterboxed playback on the lock screen

This site outputs 9:16 portrait video. If you applied a non-9:16 file from another source, the Galaxy preview may letterbox or crop. Re-export to 9:16 portrait and retry.

Safety notes

Samsung Galaxy AI Wallpaper / Generative Wallpaper is a separate first-party feature with its own restrictions (Google's policy restricts users under 13). The flow in this guide uses the standard wallpaper picker only and never asks you to install a third-party APK from outside the Galaxy Store or Google Play.

Official sources

Every step above traces back to Samsung's own Support article. We re-verify the URL with a real browser before each major doc update.

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