I'm reading some of the responses and I begin to pout. It's sad that if you're hired to do a music video for an artist that you would want to limit the artist's input and such. Is the music video yours or the artist's? I would suggest to those of you who want to limit the artists input due to "time", ask the artist to come up with a script, direction, mood and what they want conveyed. Unless you are the one with all of this then why should an artist suffer just for you to make a quick buck.
To waste less time, ask the artist to come back later with a script, detail them on how you shoot and why, what works best and you also need to be prepared to work under the given conditions! If there is a certain scene you cannot do / accomplish then say you can't. But don't take the job and then try to redirect the story. If am an artist who's gonna pay, I'm expecting results.
Jay_