Weird Creature filmed at waterfall in Iceland

Several days ago, Vigdís Howser Harðardóttir posted a weid video on Instagram showing a small dark creature that suddenly appears and climbs over the edge of a cliff at Dettifoss waterfall in Iceland. Vigdis states:Shot on the cliff of Dettifoss, Iceland. Close to the capital city of elves, Ásbyrgi. No people in front of us and only a cliff so steep it could not carry anyone. We even went too far in my taste. I then noticed much later this little creature in my video and then a head popping up in the end.