Another angle: maybe the video is a creative or artistic piece. Sometimes slang or jargon is used in titles to describe certain content. If it's a joke or a meme, the title could be sarcastic or ironic. However, the phrase includes "por un perro," which translates to "by a dog." Could be a metaphor or a play on words?
If the video hypothetically explores themes of identity, marginalization, or surrealism, a review might analyze: video de travesti abotonada por el culo por un perro