I don't know if the video was ever actually taken down, but it's available now. Either YouTube has ruled in favour of the poster or Rumblefish is taking a cut of the advertising on the video.

If it's the latter, then I believe that makes Rumblefish guilty of copyright infringement, since they're profiting off the copyright (the video) of the poster.

DMCA request or not, that seems like it would be actionable.