If you’ve ever wanted your desktop to be a looping MP4 of crashing waves, a subtle animated gradient, or that mesmerizing neon city clip from Wallpaper Engine — Microsoft is testing a built-in way to do exactly that in Windows 11. The company quietly added a video-wallpaper capability to recent Insider builds, letting users pick video files (MP4, MKV and friends) as their desktop background so they play every time you go to the desktop.

The feature is currently hidden in Windows 11 preview builds in the Dev/Beta channel (appearing in builds in the 26×20.6690 range) and hasn’t been formally announced yet. Early reports say the OS will accept common container formats — MP4, MKV, AVI, WebM, etc. — and treat them like an image background: set the file and the desktop starts playing it. That’s a lot closer to what third-party tools like Wallpaper Engine do than anything Windows has offered lately.

If you’re nosey and willing to run preview builds, hands-on testing shows the UI for adding a video is tucked under Settings → Personalization → Background (for now, the Settings page hasn’t fully updated its copy or icons since the feature is experimental). WindowsLatest walked through the steps and confirmed the video plays as soon as you view the desktop.

This isn’t some wild new idea — Microsoft tried this before. In the Vista era, there was DreamScene, an Ultimate-edition extra that let you use WMV and MPEG content as animated wallpapers. DreamScene disappeared with Windows 7 and the company leaned into static slideshow backgrounds instead. The return of video wallpapers is a clear nod to that legacy — but implemented for modern codecs, display stacks and expectations.

Personalization is surprisingly sticky. Wallpaper Engine has consistently been one of Steam’s most used apps because people leave it running to get living, reactive desktops — animated scenes, audio-reactive wallpapers, even interactive backgrounds. Native support could let Windows offer the same kind of polish without needing third-party apps, which matters on locked-down machines or for users who want a simpler experience.

Desktop videos look cool, but they aren’t free. Running a video in the background touches GPU and/or CPU scheduling, and on laptops, that can translate into worse battery life. The original DreamScene tried to mitigate this by pausing or falling back to static wallpapers when a full-screen app ran or the system was on battery; modern Windows will likely need the same guardrails. Reporters testing the preview have flagged those battery/performance questions as the main outstanding concerns. Expect Microsoft to address them before any wide rollout.

This is Insider-only right now. Some testers have reported being able to toggle the capability via an internal feature flag (reports mention a feature ID exposed in the preview builds) and then restarting Explorer to make the video wallpaper show up. That’s for people comfortable digging into preview builds and toggling hidden flags; for everyone else, the safest option is to wait for Microsoft to flip the switch in a public update.

Microsoft has been experimenting with more dynamic, animated wallpaper systems for years. Internal work and prototypes surfaced in public — even a former Microsoft designer shared what early dynamic wallpaper concepts looked like — but those projects didn’t ship in the 2023 refresh and some elements were cut from later updates. Bringing native video wallpapers back feels like a slower, more conservative revival of that ambition: tighter integration, more format support, and hopefully smarter power management.

So, should you be excited?

If you love a highly personalized desktop and you’ve used Wallpaper Engine or Lively Wallpaper, this is welcome — and overdue — news. For the rest of us, the headline is “choice”: Windows will let users who want moving backgrounds have them without installing extra software. But the real story will be in the details: how Microsoft balances battery life, whether the feature is allowed or restricted on enterprise devices, and whether the OS lets creators package and share video wallpaper packs the way Wallpaper Engine does.

Right now it’s a test. If things go well in the Dev/Beta rings, expect a fuller announcement (and UI polish) in a forthcoming update — possibly as part of Windows 11’s broader iterative feature drops. Until then, third-party tools still do the heavy lifting for anyone who can’t wait.