What is the "Metal Alphabet" viral video about?

The viral video "Metal Alphabet" features a 2-year-old singing the alphabet with heavy metal music playing in the background. The girl head bangs and somewhat angrily shouts the letters of the alphabet in typical heavy metal fashion while looking into the camera.

The little girl in the video sits on her father's lap while singing the alphabet. The music stops playing in the middle of the video, at which point her father appears laughing. The music starts back up, and the girl resumes singing. According to the video description the father wrote, he and his daughter filmed the video right after her bath time, which explains why she is wearing a hooded animal towel.