A bunch of similar summaries around movies which have been doing the round at YouTube. I wonder what the purpose of such summaries is - is it to define the plo

A bunch of similar summaries around movies which have been doing the round at YouTube. I wonder what the purpose of such summaries is - is it to define the plot section ala Wikipedia movie plots or IMDB plots or is it for really condensing knowledge into abstracts. The latter does require a certain degree of both cognition around the domain as well creative writing to make it engaging.