Lesson5.md

@@ -33,7 +33,7 @@ We started out by rebuilding the robot with respect to the building instructions
 We started by running Bagnall's program [2] without modifications, on the floor in the large working space in the Zuse building. This didn't give a good result: The robot just rushed backwards, either 'standing upright' leaning on the sensor placed at the front, or sliding on it's back, and therefore never holding its balance
 (as seen in Video 1).
 
-[![Robot performing poorly using Bagnall's program](http://img.youtube.com/vi/kBf7uqhhTHM/0.jpg)](https://www.youtube.com/watch?v=kBf7uqhhTHM)
+[![Robot performing poorly running Bagnall's program](http://img.youtube.com/vi/kBf7uqhhTHM/0.jpg)](https://www.youtube.com/watch?v=kBf7uqhhTHM)
 
 *Video 1: Robot racing around and resting on its light sensor.* 
 
@@ -269,3 +269,9 @@ We observed that changes in the angle reflected less strongly in the readings of
 [4] GUI for establishing a Bluetooth connection to an and setting parameters for the robot's control program in real-time: [TrackerController.java](http://legolab.cs.au.dk/DigitalControl.dir/NXT/Lesson2.dir/Lesson2programs/TrackerController.java)
 
 [5] Wikipedia article with information on grid search, [Hyperparameter optimization (grid search)] (https://en.wikipedia.org/wiki/Hyperparameter_optimization#Grid_search)
+
+[6] Video 1: [Robot running Bagnall's program](https://www.youtube.com/watch?v=kBf7uqhhTHM)
+
+[7] Video 2: [Robot in a dark room](https://www.youtube.com/watch?v=JAj4VaBqbhc)
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+[8] Video 3: [Robot after calibration against door](https://www.youtube.com/watch?v=MXfxQUSM9SA)