I also noticed that at 5:32, your animation is different than where you had set it earlier. You had the key frames set for 1, 20, and 40. Not i see it is 0, 30 and you are setting for 80. That part of the video is also missing. Making this video very difficult to follow for a beginner. And has left me confused on how to set things up properly to follow the instruction video.
HI Rahim,
I can see how that might be a bit confusing, but where the Keyframes are, only influences the speed of the rotation of the 'Cylinder' and has no consequence for how the Constraint works.
Physics are fun to play with, don't think you must use the exact same Values as the Instructor; experiment and see what happens if you change Values.