I don't spontaneously see images or specific storylines when hearing or playing music. It's more about moods and emotions for me, or simply the aural.
What's fascinating to me is how different we all are as humans and how our minds apparently experience the world differently.
When we were about 15 years old, my school class had a substitute music teacher for a semester or two. She was only a few years older (20+ something) and belonged to the same youth choir as a few of us. She had some kind of music education but I doubt she had the pedagogical qualifications to teach school music as a permanent teacher and she had never taught before. She was a very engaged and ambitious teacher and her lessons were often excellent but some were a bit different from our previous teachers' and could seem to indicate a lack of understanding of the variety of musicality and how it manifested in different people. (This was the compulsory music education that all pupils regardless of interest and inclinations had to take.) I remember one lesson in particular when we were asked about the stories different pieces of music were telling. The impression she gave was that this was what it was like to listen to music as a human. Stories and images would naturally unfold in the mind as you listened. I'm sure that was her personal experience, but as I said earlier that's not how I'm wired. Several people in the class also seemed awkward. I guess I just made something up that I deemed fitting but of course I knew I was faking it and at the time it made me feel inadequate for lacking this innate ability or this connection between music, visual and storytelling in my mind.
Several decades have passed and the memory has faded somewhat but for me the lesson learned was never to assume that somebody else's mind has to work similarly to my own.