We often say an artist "makes so much with so little." And whether we're talking about Pizarnik or MacGyver, we're referring to their ability to maximize the expressive possibilities of the materials they work with. Never before has this expression described so well an artistic phenomenon as with the boys of 5-Second Films.
The idea (making five-second long films) is not much more than the name. But it is no less either. And the implementation has surpassed the idea (as in the commonplace, not that they've started making longer shorts). So relax, and learn to enjoy the magic of cinema.