diff --git a/rl/extra_reading.txt b/rl/extra_reading.txt
index 64dd9812..fac79d64 100644
--- a/rl/extra_reading.txt
+++ b/rl/extra_reading.txt
@@ -1,6 +1,9 @@
 Finite-time Analysis of the Multiarmed Bandit Problem
 https://homes.di.unimi.it/cesa-bianchi/Pubblicazioni/ml-02.pdf
 
+A Nice Lecture for Students Who Claim "RL Doesn't Use Math"
+https://www.youtube.com/watch?v=dhEF5pfYmvc
+
 Hacking Google reCAPTCHA v3 using Reinforcement Learning
 https://arxiv.org/pdf/1903.01003.pdf