The other day I posted this video, which I was sent by an American TV researcher. I was not aware that it had been so widely distributed and am quite surprised that I have not seen it before. I always look for zoological explanations if I can, and Robert Schneck wrote:
Assuming it's not a CGI hoax, it might be a wading bird, an egret perhaps, walking directly towards the camera. Why it's walking around at night I couldn't guess, though something might have disturbed it.
On the other hand, my lovely wife Corinna suggested that it could be a snake rearing up.