add video link in readme

README.md

@@ -1,4 +1,4 @@
-Realtime branch. There're still some bugs, debugging.
+Realtime branch. Outdoor test video on [Youtube (real-time)](https://youtu.be/_IuTsZrurBM)
 
 Modification: 
 1. Add real-time code. 
@@ -18,7 +18,7 @@ Build with `build.sh`. Modify the path in `config/euroc.yaml`.
 
 Tested on [EuRoc](http://projects.asl.ethz.ch/datasets/doku.php?id=kmavvisualinertialdatasets) ROS bag data with ROS launch file `Examples/ROS/ORB_VIO/launch/testeuroc.launch`. Files in `pyplotscripts` can be used to visualize some results.
 
-Tested on sensors: [UI-1221-LE](https://en.ids-imaging.com/store/ui-1221le.html) and [3DM-GX3-25](http://www.microstrain.com/inertial/3dm-gx3-25), see video on [Youtube (real-time)](https://youtu.be/AUWBpSj-XtA) or [YouKu](http://v.youku.com/v_show/id_XMTkxMjgzMzMwOA).
+Tested on sensors: [UI-1221-LE](https://en.ids-imaging.com/store/ui-1221le.html) and [3DM-GX3-25](http://www.microstrain.com/inertial/3dm-gx3-25), videos on [Youtube (real-time)](https://youtu.be/AUWBpSj-XtA) or [YouKu](http://v.youku.com/v_show/id_XMTkxMjgzMzMwOA).
 
 Please contact `jp08-at-foxmail-dot-com` for more details.