Earlier today I shot high school football championships at the Tacoma Dome with a pre-production Canon 1D Mark IV. Here is some sample video clips, shot at 60FPS and slowed down. Look in the upper-left corner to see the playback speed.
The lens was a Canon 400mm 2.8 at ISO 5000.
Also, please check out this video, which is actually converted properly: vimeo.com/8163730. Thanks to the commenters below for pointing the problem out.