I must first remind you about copyright laws and fair use agreements: Music is considered licensed work by musicians, and unless they grant you permission to use their music on your videos, don't.
YouTube has arranged some audio clips from musicians that you can use on your videos. If you create a video of a neighborhood or home and you do not want to narrate it, add music instead.
After you have your video uploaded to your YouTube account, select "Edit Video." Then you'll see the "Audio" tab at the top. If you click there, you will be able to choose an audio track. Search for music or select to see music appropriate for the length of your video.
And remember, if you do use music or any other content that violates fair use, YouTube reserves the right to shut down your account. All your videos? ... Gone! I've seen that happen before, too!
For more on copyright and fair use, see YouTube's Copyright Education page.
Submitted by Kim Wood- Lead Coach of the The TechByte