Microsoft removed Messaging-Skype integration in Windows 10 PC version with the Build 14316 in favor of the Skype UWP Preview app and with Build 14332 the Windows 10 Mobile also lost the Skype integration. What was however surprising was absence of Skype UWP Preview app on Windows 10 Mobile Build 1432. Now, a video posted by WindowsBlogItalia demos the Skype UWP app for Windows 10 Mobile in action.
Though the video is in Italian, you can still notice the app UI and how the app behaves while in action.