The video tutorial explains how to handle complex JSON structures in Java by creating and injecting classes for nested JSONs. It covers the creation of child classes for different JSON elements, managing JSON arrays using lists, and finalizing the JSON structure. The tutorial emphasizes the importance of understanding JSON hierarchies and data types to effectively deserialize JSON responses.

Explain the concept of nested JSON as mentioned in the text.

What is the main purpose of creating a class called Mobile Java API?

What are the key variables that need to be defined in the classes for web automation?

Describe the process of injecting child classes into the parent class.

How does the hierarchy of classes change when adding new child classes?

How should the return type be modified when dealing with multiple JSON items?

What is the expected output format when creating JSON from the POJO class?

Why is it important to handle multiple items in JSON correctly?

What is the significance of using a list for web automation JSON?

What changes need to be made to the getters and setters when the return type is updated?