I think the comparison is not accurate. According to you, the person you are answering to would only have to listen to the song somewhere. In reality, the movie you are mentioning isn’t being shown to him in the cinema (when watching something on YouTube) but instead he is given a CD (or USB stick, …) to put into a CD-drive (or port) in the cinema to start the movie. After the movie is finished, the person watching the movie leaves and the movie stays at the cinema but OP has „infinite“ access to it unless the cinema decides not to show it anymore. However, that’s still not how it works because I’m sure YouTube has some licensing going on.