sorry, but are you checking shading from motion, not contour?
I get this link: https://moodlearchive.epfl.ch/2021-2022/mod/url/view.php?id=1077500
and it returns "This recording does not exist. (3,301)"
Ah, you are talking about the recordings, I thought you were talking about the lecture notes. I also get the error for the recording. (Between you meant Shape from motion, not shading from motion)