The story In the song was showing that after his mother’s death he had no one to be there for him so he made himself believe he had a brother or what some people say an imaginary mechanism to take him through the pain and make him feel like there was someone there for him which is where the lines I’ll go with you and stay with me and if everyone deserts your fight I’ll grab my bat and go with you and so on but you basically got it spot on and this song has been one of my favourites for a while I’m glad you liked it
The beginning shot reminiscences of the last shot with him sitting on the couch when he wanted to become who he imagined was his brother and when he by the end he finally did which is why his brother disappeared because he finally become what he wanted to be.
