If you are producing this video for commercial use or profit, then you can't just use whatever music you want, there are copyright infringement issues, you will need to purchase some royalty free music to use, or produce your own music, or pay for some music. If you google royalty-free music, you will see alot of choices!! I use alot of Digital Juice products and like them, so take a look at them, there is alot of music choices there. Good luck!