Genre Research

A music video is used to promote a song, as well as entertain the viewer. This in turn makes them wish to watch it more, getting more views and, depending on if it's online or on TV, the artists will receive profit from it.

There are three types of music videos:
Narrative
Performance Based
Concept Based

Narrative:
This type of music video typically follows a story, often following the lyrics or the genre of the music that's playing. This helps keep the audience interested in the music itself as they enjoy following the story. This is the most common used for music videos in general. An example of this is Fireworks by Katy Perry.

Performance Based:
This is where the artist is either performing live to an audience or on a set, and is most common among the rock genre due to the audience more often having an upbeat atmosphere. It's also the most common for a film's soundtrack, with clips of the film put inbetween the band playing. An example of this is Decode by Paramore for the Twilight soundtrack

Concept Based:
These are often experimental, using a certain technique throughout the entire video. This is mainly seen as unusual as it's not common for only one technique to be used for a roughly 3-minute long video. An example is Clint Eastwood by the Gorillaz as they're all animated, an uncommon concept in modern day videos.