What is a music video?

Pete Fraser states that there are specific conventions that defines a music video; The video lasts at least as long as the track (can be longer if you have an intro or outro or both. The video features the artist/band quite prominently. The video features some element of performance- singing and playing instruments (usually miming) and often dancing or acting too. The video has some kind of concept along with the track. The video does not feature a complete narrative but the concept may involve fragments of narrative. Different genres of music produce slightly different visual conventions in music videos. http://petesmediablog.blogspot.co.uk/2010/10/music-video-for-level.html