The five books are right there, and you still cannot read a single title. The question marks block exactly the part you want. That is the trick, showing the list exists while withholding it. The money burst overhead suggests the payoff is worth discovering.
How the packaging works
Title
The title connects the list to a millionaire outcome and a count of five.
Thumbnail
The thumbnail shows the five real books with their covers blocked by question marks.
Remix this
Use this when your video is a short list of named things. Show the real items with the identifying part covered. The viewer must see the answer exists to feel the itch of not having it.
The transferable lesson
Show the answer exists, hide the part that resolves it.