This lecture covers rotation matrices, translations, homogeneous rotation matrices, rotation around an arbitrary point, and direct geometric modeling of serial robots. The instructor explains the methodology to establish the Denavit-Hartenberg parameters in four steps, the Denavit-Hartenberg parameters of a 6 DOF robot, and the sequence of movements for a 6 DOF robot. The lecture also delves into defining joint variables, positions of reference, geometric parameters, and chaining serially-linked movements.