diff --git a/README.md b/README.md
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+++ b/README.md
@@ -24,7 +24,7 @@ The course consists of the following set of lectures. We will aim to do slightly
 * 21/10: [Basic Algorithms and Protocols](https://www.youtube.com/watch?v=fNOEVXQKv9M) - [Notes available here](https://github.com/quantumjim/Quantum-Computation-course-Basel/blob/270ad12f3de4016c312775daa7b6cb0810fbacfa/Extra%20materials/Basic%20algorithms.pdf)
 * 28/10: [From the Fourier Transform to Shor's Algorithm](https://www.youtube.com/watch?v=WqgNu8ZziPQ)
 * 04/11: [Grover's Algorithm and why we can't yet run it](https://www.youtube.com/watch?v=YfFp3K4cAF4) - [Notes available here](https://github.com/quantumjim/Quantum-Computation-course-Basel/blob/270ad12f3de4016c312775daa7b6cb0810fbacfa/Extra%20materials/Grover.pdf)
-* 11/11: Notion of entanglement theory: checking that what we are doing is indeed quantum - [Notes available here](https://github.com/quantumjim/Quantum-Computation-course-Basel/blob/270ad12f3de4016c312775daa7b6cb0810fbacfa/Extra%20materials/Entanglement%20theory.pdf), [application notebooks available](https://github.com/quantumjim/Quantum-Computation-course-Basel/tree/main/extra_resources/Entanglement_extra)
+* 11/11: [Notion of entanglement theory: checking that what we are doing is indeed quantum](https://youtu.be/37bN3r_5Fa4) - [Notes available here](https://github.com/quantumjim/Quantum-Computation-course-Basel/blob/270ad12f3de4016c312775daa7b6cb0810fbacfa/Extra%20materials/Entanglement%20theory.pdf), [application notebooks available](https://github.com/quantumjim/Quantum-Computation-course-Basel/tree/main/extra_resources/Entanglement_extra)
 * 18/11: The main obstacle to fault-tolance: noise in Quantum computers - [Notes available here](https://github.com/quantumjim/Quantum-Computation-course-Basel/blob/270ad12f3de4016c312775daa7b6cb0810fbacfa/Extra%20materials/Noise%20in%20QC.pdf)
 * 25/11: Mitigating noise: being right at a cost [May change]
 * 02/12: [Introduction to QEC 1: The repetition code](https://www.youtube.com/watch?v=AuDfq7j_W7E&list=PLaU1vYImkPDxyqJ6zHAs8W92fYKsfXsV-&index=10) and [Introduction to QEC 2: The surface code](https://www.youtube.com/watch?v=IdZkxX-Qank&list=PLaU1vYImkPDxyqJ6zHAs8W92fYKsfXsV-&index=11)