In this 46 mins Video Lesson :

Introduction to Fourier series,
Fourier Series in an arbitrary period of 2L,
Even and Odd functions in (-L,L),
Dirichlet's Conditions,
and other topics.

In this 66 mins Video Lesson :

Typical Problems on Fourier Series,
Kth Partial Sum,
Deductions based on Fourier Series (where f(x) is continuous),
Deductions based on Fourier Series (where f(x) is discontinuous),
and other topics.

In this 49 mins Video Lesson :

Half Range Cosine Series,
Half Range Sine Series,
Typical Problems on Half Range Fourier Series,
Complex Form of Fourier Series,
and other topics.

In this 35 mins Video Lesson :

Fourier Series and Practical Harmonic Analysis,
Typical Problems on Harmonic Analysis,
and other topics.