@notjustbikes Great video! My wife and I explored the Stockholm metro last summer, and we had a great time.
One thing that really helped us was that the CityMapper transit app includes a map that shows certain stations with a "selected art in the subway" symbol. We found it was much more helpful than any of the lists we found on the internet, particularly when we were out exploring during the day.
The same map is available online at https://spartrafikkarta.se/