A song's melody is usually all you need to capture an audience's attention. Thousands of bands try to play up the visual aspect of the music (here's looking at you, KISS), but it normally just comes down to how catchy the song is, at the end of the day.
Then again, maybe people using the visual medium do have a point. Instead of turning to the music video for exposure, these songs have garnered tons of attention because of their use in a popular film.
The song could have been fine on its own, but matching it with the trials and tribulations of our protagonist gives an extra layer of depth to the song that you never knew was there. Oftentimes the presence of the song is so powerful that it's hard to separate the music from the scene that it's being played in.
Whereas most of these songs have come from big name acts, the best examples are relics from the past that are dusted off and given a whole new life by the director.
Even if these songs were DOA on the charts, they will forever be in our hearts thanks to their time on the big screen.
I'm just a junkie for all things media. Whether it's music, movies, TV, or just other reviews, I absolutely adore this stuff. But music was my first love, and I love having the opportunity to share it with you good people.