The title turns watching into a game you can lose, which makes the click a dare to yourself. The warped famous face is the first test. If that one nearly gets you, surviving ten laughs suddenly feels hard, and now you have to try.
How the packaging works
Title
It sets the game and the losing condition in plain words.
Thumbnail
It shows one sample joke so you can test yourself before clicking.
Remix this
When you want viewers active rather than passive, set a rule they can fail before pressing play. For a teaching channel, a spot-the-mistake frame does the same job as a laugh challenge.