In general, music videos contain visuals that either represent the potential connotative meaning of the lyrics or the visuals can represent a semiotic system of its own.
Yet this stimulus can not be divorced from the visual evidence of the speaker's manner and gestures, and the general awareness of the physical location and its possible connotative significance.
Description uses tools such as denotative language, connotative language, figurative language, metaphor, and simile to arrive at a dominant impression.
But connotative meanings are context-dependent, i.e. the addressee must learn how to match the meaning intended by the addresser to one of the various possible meanings held in memory.
Over time, each individual in the audience develops a cognitive framework of codes which will recall the denotative meaning and suggest possible connotative meanings for each signifier.