Microsoft is also thought to be testing video backgrounds, but that's still missing from the latest preview build.

Microsoft has released a new Windows 11 Insider Preview. It visually modernizes some dialogs, among other things.

You can now open Settings > Personalization > Desktop Background, and choose any .webp image as the background.

I tried four vibe-coding tools, including Cursor and Replit, with no coding background. Here's what worked (and what didn't).