CLEAN : FILE: FBI hacks attackers iPhone drops Apple suit 2

The video tutorial introduces the concept of collections, explores different types of collections, and explains the backing around concept.

What is the main focus of the second concept introduced in the video?

• A different teaching method

• A new programming language

• The second concept

• A historical event

What does the video discuss after introducing the second concept?

• A new software tool

• Other collections

• A famous personality

• A scientific theory

What is mentioned briefly at the end of the video?

• Backing around

• A mathematical formula

• A new project

• A famous quote