Concatenation is a Rube Goldberg-esque video montage made up of cleverly arranged stock video footage. This is one of those things where I'm like, "ugh this is so good, why didn't I think of this?" See also this clipart animation:
(via waxy)
Update: The music video for Cassius' Go Up uses a similar technique of juxtaposing stock videos. (via @endquote)