diff --git a/book/book.tex b/book/book.tex
index 055b710b..6965c396 100644
--- a/book/book.tex
+++ b/book/book.tex
@@ -3208,7 +3208,7 @@ \section{Exercises}
 Science and Mathematics of Sound, Frequency, and Pitch)''; it
 demonstrates the missing fundamental phenomenon and explains how pitch
 perception works (at least, to the degree that we know).  Watch it at
-\url{https://www.youtube.com/watch?v=i_0DXxNeaQ0}.
+\url{https://vimeo.com/147902575}.