Encapsulation
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
Encapsulation makes a class's attributes and behaviors self-contained, traveling with the object through its lifetime, with internal implementation hidden from outside — enforced by scope rules and access modifiers.
Show
A fare card exposes tap-to-pay and hides everything about how the balance lives inside.
Watch for
The hiding is a promise to callers, not shyness.