Music promotional videos have innovated a lot in the years. From literally just a performance and no narrative to incorporating narrative and performance into one performance. Taking Oasis when they first started as an example, it's literally them standing on a stage and singing, no movement or anything. If you compare it to now where we add narrative in it. We see more of a story in the performance. So if there was a song about love, there would be stereotypically and man and female on screen telling the story of the song.