Music Videos: Tropes & Memes

The style of music videos differ greatly across music genres. A particularly clear example of this dichotomy is between rock and RnB. Here are 2 videos that show this perfectly:
My Chemical Romance - I Don't Love You:

Rock videos are very focused on the music. The music is at the heart of the band, wheras for some other genres, it is more about image and popularity. Although Gerard etc (MCR) all are dressed to impress and looking gooooood, you can tell through their emotion what really matters. Rock has progressed from being all about the music and not caring so much about the appearance and promotion; to still being 100% about the music, however now with added emphasis on appearance. Most rock bands still prefer their music to be favoured over themselves, which is not the case with all genres.

Nicki Manaj - Super Bass:

RnB videos are predominantly sexually orientated and of a more show-off nature. Rock videos tend to have more of a structure, and can be a full story. Call me a cynic but in my opinion the music - rather than being the heart of the performance - is more of an excuse to act sexually as the performers, for example in clubs etc. It seems to be more of a tool to attract, with the actual music being forgotten; and therefore much simpler and similar sounding. Following on from my theory, most contempory RnB videos don't really have a story, and focus a lot on dancing and movement. However Chase & Status' videos are quite deep and have real meaning behind them. This is a rare commodity in modern chart music. Here is their video "Time":