In video series covered about

1. React JS Introduction and prerequisites
   1. React JS Introduction
   2. ES6 features-var,let,const,arrow function , this keyword , class and object
2. Project Setup and walkthrough project files
3. Webpack and Babel
4. Components and Types of components (functional and class component)
5. Props
6. State in React JS component
   1. Handling state in components
   2. State manipulating in React JS
   3. Event Handling with methods
7. UseState Hook
8. React JS Component Lifecycle
9. Two way data binding
10. Form OnSubmit Event
11. Form Validation and error displaying
12. React Router

Please proceed to watch video series for more details