Microsoft surprised everyone with a new Windows 10 Story Remix feature earlier today. It's essentially a video editing tool that will let you merge together photos and videos with impressive 3D effects. It was one of the surprise additions to Microsoft's Build keynote, and now the company is allowing Windows 10 testers to experiment with the new app ahead of its debut in the Fall Creators Update later this year.

While Story Remix appeared to be a separate app on stage at Build earlier, Microsoft now describes it as "an evolution of the Photos app," suggesting that these features will simply ship as part of the default Photos app in Windows 10. If that's the case then Microsoft has just built a powerful video editing tool straight into Windows, something it has needed after it killed off Windows Movie Maker years ago.

If you're a Windows Insider in the Fast Ring then you can download the latest Windows 10 build 16193 and start testing the Story Remix feature. You'll be able to create videos with soundtracks, themes, and transitions, with the ability to export them to YouTube, Facebook, or share them via email or OneDrive.