Let's take a look at VideoSift' Art channel:
Gnarls Barkley's Crazy on a Theremin
When Leon Theremin invented the world's first (and probably only) musical instrument that can be played without being touched in 1919, who knew it would lead to this awesomeness: Link
Brandon McConnell's Space Painting
Brandon McConnell is one amazing spray paint artist. Here's a video of him creating a fantasy "space" landscape in just a few minutes.
Subway Train Covered in Graffiti in 2 Minutes
How long does it take to completely cover a subway train in graffiti? Less than 2 minutes!
When a group of "artists" show up to tag the Metro Madrid train in Spain, the rent-a-cop security guard is perplexed as of what to do... Don't get any idea, kids: Link
Gary Jules' Mad World
The music video for Mad World cover by Gary Jules is fantastic! You may remember this from the movie Donnie Darko, or more recently from the Gears of War game ad.
Bradley Litwin's Octapult
In 2006, Bradley Litwin created this fantastic kinetic sculpture, called the Octapult, which uses 8 synchronized catapults to launch 160 plastic balls per minute. No squirrel is harmed in the making of this artwork. Link
For more the web's most interesting videos, check out: VideoSift.