This will come in handy. By Rod Trent at WinSuperSite.com…
…However, for those that want to do image and video capture on-the-cheap, Microsoft includes a screen recording utility in Windows 10’s new Xbox app. As you can imagine, this is generally meant for recording Xbox games streamed to a Windows 10 PC, but what’s especially interesting is that the recording utility also works for regular apps.
Source: How To: Use Windows 10’s Screen Recording Utility | Windows 10 content from SuperSite for Windows