1) The document discusses several music video conventions including artistic camerawork, breaking continuity editing rules, use of lighting, close-ups of artists, lip syncing, narrative structure, length of music videos, and use of special effects.
2) It analyzes how the conventions were used or challenged in the author's own music video and provides examples from other artists' music videos to illustrate the conventions.
3) The purpose of using or challenging conventions is discussed as a way to make artists stand out, sell their star image, keep audiences interested, and make music videos easier to produce.