Tensor Calculus 20: The Abstract Covariant Derivative (Levi-Civita Connection)
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Tensor Calculus 21: Lie Bracket, Flow, Torsion Tensor (contains error; see pinned comment)
22:50
Tensor Calculus 19: Covariant Derivative (Intrinsic) and Geodesics
19:22
The Meaning of the Metric Tensor
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The many surprising connections in higher math
19:07
Tensor Calculus 13: Gradient vs "d" operator (exterior derivative/differential)
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Géométrie et topologie pour la physique: 1.2 Connexion de Levi-Civita
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Why is calculus so ... EASY ?
33:51