Chapter 20, Simulation III video lecture not correct on YouTube
Reference: Hamming on Hamming YouTube Channel
The video labeled, "20 Hamming, Learning to Learn: Simulation III, 10 May 1995" with filename, 20Hamming1995May10.SimulationIII.mp4, is a duplicate of "21 Hamming, Learning to Learn: Fiber Optics, 12 May 1995" with filename, 21Hamming1995May12.FiberOptics.mp4.
The correct video for the lecture on Simulation III is not present on YouTube.