Don’t worry: no DSLRs were, to my knowledge, harmed in the making of this music video—though boy does it test the viewer’s tolerance for motion sickness.

The filmmakers write,

The device is powered by an electric drill, constructed from bicycle and drum parts, wood and metal plates, which was strong enough to allow us to rotate the heavy weight of a Canon 5D MKII stably and at a very high speed. The drill was plugged to a variable speed controller, allowing us to adjust the speed of the cameras rotations by turning a dial.
The setting of the video is the band preforming live in a studio set. The main camera rotates at a selected speed as the band performs. While the camera is rotating, objects such as the skin of the bass drum start to rotate at the same speed as the main camera, giving the effect of those objects becoming static in the frame while everything else is spinning. When a person stands in front of these objects it gives the effect of the person spinning rather than the background.
Other circular boards with graphics are turned on and off running in and out of sync with the main rotating camera. Each of these graphics have variable speed control dials to adjust their speed.

Here’s the making-of:

[Via]