This seems like a junk experiment. They asked people to perform a task that would be easier if you had some information. Then they started showing them videos

This seems like a junk experiment. They asked people to perform a task that would be easier if you had some information. Then they started showing them videos. The subjects stopped watching when they had enough inspiration for their story. That's it. It's as if the authors of the study think the subjects have ESP and know that evidence contrary to their goal is coming up, and therefore decide to stop watching.