It's unclear what about this weekend has unearthed such a bounty of incredible music videos, but this one is perhaps the greatest—a Rube Goldberg-esque instrument using 2000 marbles. The insanely complicated device was created by Martin Molin, who also scored the song. It is, simply put, hard to only watch once, because not only is the song highly enjoyable, you'll want to watch every detail to figure out just how every part of the machine works. Molin is part of the Swedish band Wintergatan, which typically use tons of instruments in a really complex way, so this is an interesting twist on that tradition. He's also wearing some kind of crazy Enlightentment-era jacket that you can really only get away with if you're a Swedish marble rock musician.
Here's more of Wintergatan, so you can see their usual many-instrumented style: