Looking at the video, not too sure what that is..
First thought (even before seeing the caption) was Hah its a bear.
But it’s an odd vid clip. The animal appears very “static” even when moving – ie not a lot of movement to the body linked to the forward gait. Bears tend to roll at the shoulders / hips?
Also re the shoulders – seem to be very far forward and slope right in to the highly / steeply inclined neck. (Brown) bears tend to have a pronounced shoulder hump. Could be becasue it is carrying something (fish) held high away from the water?