“How I'd learn marketing fast” lets any beginner borrow an expert's route. The thumbnail answers why you should listen before you ask, with “Marketing Genius” and an arrow pointing straight at the person giving the advice. A shortcut is only worth taking from someone who knows the way, and the label makes that clear.
How the packaging works
Title
It offers her fast route so any beginner can self-insert.
Thumbnail
It labels her the genius so the shortcut has authority behind it.
Remix this
Use this when your credibility is not obvious from your face alone. Place a short authority label near you with a simple arrow. The label must be one a stranger instantly believes, or it reads as bragging.
The transferable lesson
Label the expert on the thumbnail so viewers know why to trust the shortcut.