Would you rather only be able to listen to one song for the rest of your life or only be able to watch one movie for the rest of your life?
Since I don’t listen to music hardly, I’d choose listen to one song as I cannot imagine not watching movies forever.
That's like asking if you'd like to die a long slow death or a slow long death lol 😀
I'll go with the movie. Listening to the same song in perpetuity is a known form of torture so it's the movie for me, preferable something long and incomprehensible so I can spend the rest of my life trying to work it out!
If I picked one or the other and only being able to listen or watch that one thing over forever I know for certain that down the road very soon I would be swearing it off and doing something else.