"The Switch" has almost two million views on YouTube.  Pretty amazing - and it's a student film to boot.  The set is completely basic, the props are just cubes.  So what sells it?  One, the fantastic character animation.  Two, the protagonists' curiosity propels our curiosity.  That's really the ingrediant that every story needs and few really have nowadays - what's going to happen next?  Great short.  Enjoy.