And they tell you that the best part is last; and remind you numerous times to be sure and wait for the end. (Do they get ‘points’ for viewers who wait for the end, and how would YouTube know that?)
I appreciate the people who undermine the system by giving a summary in the comments.
Yes, and youtube can tell where you stop watching.
So can the guy who put up the video.
It allows them to see where you lost interest.
There is a guy who debunks a lot of urban myths and such. He tells the story and then says, "That is the story, but, is it accurate?" He says he can watch the viewership drop off a cliff at that point.
People are there for the story, not for reality.