National Geographic article

Here (the bold font is mine):

Fitzpatrick's team concludes that available data on wingspan and flight style does indeed indicate an ivory-billed woodpecker. The researchers also point out that the video was presented to the Arkansas Audubon Society, which voted unanimously to accept it as proof of the bird's existence.
...
"Nothing in the video is inconsistent with [a] pileated woodpecker, and many of our key points are not refuted by the Cornell team's response," Sibley said. "Therefore the video cannot be proof of the existence of [an ivory-bill]."