Theme customizer is an awesome feature that allows you to change theme’s settings like color, font size background image, what menu should be shown on your website etc. with a live preview.
This course series includes six videos. Hope you enjoy them.
PART 1 :
Introduction to WordPress Theme Customization
https://www.youtube.com/watch?v=EPShJq0wSkE
PART 2 :
Sections, Controls and Settings
https://www.youtube.com/watch?v=QBSqzrFmrYE
PART 3 :
Coding our first setting, section and control
https://www.youtube.com/watch?v=pg57H1ZRv-I