Well it's like a vid in the close relationship it has with the lyrics and the text, much more of one than in a standard TV montage. But its also not like a vid in how compressed the story is and embedded within the larger story of the episode. in that way it's more like a musical number from a musical. It moves the story along rather than commenting on it or making an argument. So its kind of a hybrid but does suggest that the makers have experience of both previous forms.