Payoff

Every package sets an expectation, and the payoff is where that expectation gets met. In a tutorial it is the thing working. In a challenge it is the result. In a story it is the turn the viewer was waiting for. Weak videos delay the payoff to hold people, which usually does the opposite once a viewer works out they are being stalled. Padding runtime to stretch watch time can lower satisfaction scores and flatten the retention curve, and YouTube can deprioritise a video on that basis even when the raw watch-time figure looks fine. Deliver the promise, then earn the rest of the runtime with what follows it.