Lesson7.md

@@ -146,12 +146,12 @@ TODO:
 [6] [The RobotFigure9_9.java program](https://gitlab.au.dk/LEGO/lego-kode/blob/master/src/Lesson7programs/RobotFigure9_9.java) *(modified)*  
 [7] [The Escape.java program](https://gitlab.au.dk/LEGO/lego-kode/blob/master/src/Lesson7programs/Escape.java)  
 [8] [The FollowWithMotor.java program](https://gitlab.au.dk/LEGO/lego-kode/blob/master/src/Lesson7programs/FollowWithMotor.java)   
-[9] [Video 1](http://img.youtube.com/vi/4Xa1ZYIT-Rs/0.jpg)](https://www.youtube.com/watch?v=4Xa1ZYIT-Rs)   
-[10] [Video 2](http://img.youtube.com/vi/Um4zjVYArJ0/0.jpg)](https://www.youtube.com/watch?v=Um4zjVYArJ0)   
-[11] [Video 3](http://img.youtube.com/vi/2qxAJpQgZMM/0.jpg)](https://www.youtube.com/watch?v=2qxAJpQgZMM)   
-[12] [Video 4](http://img.youtube.com/vi/--ZTLgyoltc/0.jpg)](https://www.youtube.com/watch?v=--ZTLgyoltc)   
-[13] [Video 5](http://img.youtube.com/vi/nINQb163pyQ/0.jpg)](https://www.youtube.com/watch?v=nINQb163pyQ)   
-[14] [Video 6](http://img.youtube.com/vi/7dXc0_qPSww/0.jpg)](https://www.youtube.com/watch?v=7dXc0_qPSww)   
-[15] [Video 7](http://img.youtube.com/vi/63BJjsBgtrg/0.jpg)](https://www.youtube.com/watch?v=63BJjsBgtrg)   
-[16] [Video 8](http://img.youtube.com/vi/bbRn_WVlDwk/0.jpg)](https://www.youtube.com/watch?v=bbRn_WVlDwk)   
-[17] [Video 9](http://img.youtube.com/vi/YZ3ukgE0WIk/0.jpg)](https://www.youtube.com/watch?v=YZ3ukgE0WIk)   
+[9] [Video 1](https://www.youtube.com/watch?v=4Xa1ZYIT-Rs)   
+[10] [Video 2](https://www.youtube.com/watch?v=Um4zjVYArJ0)   
+[11] [Video 3](https://www.youtube.com/watch?v=2qxAJpQgZMM)   
+[12] [Video 4](https://www.youtube.com/watch?v=--ZTLgyoltc)   
+[13] [Video 5](https://www.youtube.com/watch?v=nINQb163pyQ)   
+[14] [Video 6](https://www.youtube.com/watch?v=7dXc0_qPSww)   
+[15] [Video 7](https://www.youtube.com/watch?v=63BJjsBgtrg)   
+[16] [Video 8](https://www.youtube.com/watch?v=bbRn_WVlDwk)   
+[17] [Video 9](https://www.youtube.com/watch?v=YZ3ukgE0WIk)