From time to time, Apple publishes short tutorials on its Brazilian YouTube channel teaching users how to get things done or giving little tips on products and services in their ecosystem.
Here are your most recent:
Using the multitasking feature on iPad
How to migrate from Android to iPhone
Apple Watch Series 4 Watching Your Activity History
Apple Watch Series 4 Using Siri
Apple Watch Series 4 How to Set a Running Goal
Apple Watch Series 4 How to Change Your Movement Goal
Very useful, isn't it?