5.3 — Building your first neural network 

Neural Networks Demystified – Welch Labs (Playlist)

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Short, beautifully visual videos (3–7 minutes each) that explain:

• what a neural network is (data, architecture)

• forward propagation

• gradient descent & backpropagation

• training, overfitting, regularization

This doesn’t drown beginners in code; it builds intuition. Perfect for your “first neural network” concept chapter.