Update README.md

Author: vfite

sample-videochat-webrtc/README.md

@@ -6,4 +6,6 @@ Original sample description & setup guide - [http://quickblox.com/developers/Sam
 <img src="screenshots/Login.png" width=200 />
 &nbsp;&nbsp;&nbsp;&nbsp; <img src="screenshots/Users.png" width=200 />
 &nbsp;&nbsp;&nbsp;&nbsp; <img src="screenshots/p2p.png" width=200 />
-&nbsp;&nbsp;&nbsp;&nbsp; <img src="screenshots/Group.png" width=200 />
+&nbsp;&nbsp;&nbsp;&nbsp; <img src="screenshots/Group.png" width=200 />
+&nbsp;&nbsp;&nbsp;&nbsp; <img src="screenshots/Screenshare_picture.png" width=200 />
+&nbsp;&nbsp;&nbsp;&nbsp; <img src="screenshots/Screenshare_youtube.png" width=200 />