Licensing

Before I can use my chosen song I first to gain permission from the record company (Warner Music), this is the email that I sent them:

For my A-Level media coursework I have to direct and produce my own music video using a song of my choice and I would like to use the song "Don't Dream It's Over" by Sixpence None the Richer but need your permission before I continue. I would like it to be clear that this video will not be shared publicly and the only persons who will view it will be my teacher and the exam board.
Thank you, I look forward to receiving your response.
Sincerely,
Emily Law
Chislehurst School for Girls