Due to the behavior of the subjects, as well as the calculated approximate height, I believe that the footage most likely shows two human figures trying to get a better view of the boats as they headed down the rapids.--Cliff Barackman
A New Video has been released at the oregonflyfishingblog.com. Its a montage of the investigation headed by Cliff Barackman. At the end it somewhat documents the discovery of a print near a pizza place.
The second video, which we find more satisfying is one we first saw on Cliff Barackman's Blog.
Oregon Fly Fishing Blog
Cliff's Original Investigation
Cliff's Follow Up Video Post