Added tutorial video to Readme.md

Readme.md

 ## Introduction
 This project allows (1) registering point clouds with each other and (2) registering point clouds with an HMD / VR headset in Unreal Engine 4.
 
-[Example Video] (will be available soon)
+![Tutorial Video](https://cgvr.informatik.uni-bremen.de/research/smartot/videos/LatticeBasedRegistrationTutorial_900p.mp4)
 
 ### The Plugin (see VRKinectReg/Plugins/VRKinectRegistration/)
 The registration implementation is based on our paper "Fast and Robust 3D Grid Target Detection for Registration and Calibration of Depth-Only Sensors" and is implemented as a standalone Unreal Engine 4 - plugin (see folder VRKinectReg / Plugins / VRKinectRegistration /).