Yeah. I forgot to mention that Catherine has multiple endings (I believe 6: 2 Law, 2 Chaos, 2 Neutral or something like that.) If one was to do it, they could just show all the endings at the end of the clip.
Oh, and Catherine IS suppose to be hard since it is an Atlus-developed game and 9 times out of 10,
Atlus games ARE hard. Hell, when Catherine was released in Japan, Atlus had to create a patch to make the game easier. Later releases (NA and EU) are based on that.
To quote a spokesperson: "'We get off on your tears."