What are clips

Question: Are clips objects or classes?

Instances/Objects from a Class called Wick.Clip.

In Adobe Flash they were called MovieClips, in here a similar concept and name was adopted. They are clips because they have a timeline where you can place layers and frames (like the Editor itself has when you open it), and you can play them and run animations inside them.

Then how is a clip different from a button in function and behaviour?
I understand a clip is typically used for ease of drawing/animation, while a button is typically used for interactivity, but aren’t they interchangeable?

Buttons are special clips, and have behaviors such as built in frame swapping depending on if it’s being hovered on or held down. They also, unlike clips, make the cursor change from the pointer to the hand icon when hovered on.