Update README.md

Author: rikba

README.md

@@ -6,11 +6,12 @@ Bähnemann, Rik, et al.
 "Revisiting Boustrophedon Coverage Path Planning as a Generalized Traveling Salesman Problem."
 Field and Service Robotics. Springer, Cham, 2019.
 ```
-Video: [https://youtu.be/u1UOqdJoK9s](https://youtu.be/u1UOqdJoK9s)
-
 
 ![Coverage Planning in RVIZ](https://user-images.githubusercontent.com/11293852/61134221-70d18980-a4bf-11e9-87a7-d599b60c8dd2.gif)
 
+Application video:
+[![Watch the video](https://img.youtube.com/vi/u1UOqdJoK9s/sddefault.jpg)](https://youtu.be/u1UOqdJoK9s)
+
 ## Installation on Ubuntu 18.04 and ROS melodic
 Install [ROS melodic](http://wiki.ros.org/melodic/Installation/Ubuntu).
 Install [mono](https://www.mono-project.com/download/stable/#download-lin-ubuntu).