Sorry - an addition to my above commentary. I wasn't thinking about the fact that they did this song before the prevalence of music videos -- it probably relates also to the radio programs that were popular (soap operas and such) and then when TV became more popular and more people had them in their homes, there was not the demand for people listening to stories on the radio - they were much more exciting to watch on TV.
Sorry - an addition to my above commentary. I wasn't thinking about the fact that they did this song before the prevalence of music videos -- it probably relates also to the radio programs that were popular (soap operas and such) and then when TV became more popular and more people had them in their homes, there was not the demand for people listening to stories on the radio - they were much more exciting to watch on TV.