diff --git a/old_repo/Problems/25_Single_Neuron_with_Backpropagation/youtube.txt b/old_repo/Problems/25_Single_Neuron_with_Backpropagation/youtube.txt
index c6922e3c..67b5a012 100644
--- a/old_repo/Problems/25_Single_Neuron_with_Backpropagation/youtube.txt
+++ b/old_repo/Problems/25_Single_Neuron_with_Backpropagation/youtube.txt
@@ -1 +1 @@
-https://youtu.be/LPfsTFcFqU4
\ No newline at end of file
+https://www.youtube.com/watch?v=Zs22S7kOWIs