"Footage of these experiments, which were conducted over several years, is poignant, as the kids struggle to delay gratification for just a little bit longer."

Watching the footage of the young children attempting to delay gratification is an experience that touches the user in a strange way.  It's something that almost anyone can relate to: the experience of being young and eager to enjoy a treat, like opening presents on Christmas morning, only to be told by one's parents that he or she can't do so until the parents say it's ok.  When one views the footage in a setting outside of academia, it is very easy to relate to, and elicits an emotional response.  The children are seen using a variety of coping mechanisms to deal with the temptation, from the classic "If I can't see it, I can't have it," to such extremes as stroking it like one may pet a dog.  Such behavior is endearing, and gives this footage a secondary reason to watch outside of its scientific significance.