What's especially funny for me about that video is, I have done almost exactly that, in the role of the woman in black.
See, in college I directed a performance of
Equus ("telling the story of a psychiatrist who attempts to treat a young man who has a pathological sexual fascination with horses.") There are six actors playing horses in the show, and we had many sessions where I worked with them on the proper way to walk and bob the head so as best to indicate a horse without looking comical. They were wearing these crazy metaphorical horse heads made of welded metal, however, not yellow pleather.