You can definitely get a video approved that has music only, although recording at least the words “exclusively on Fiverr” in addition can help get you approved more easily. If you use music only, be sure you put “Exclusively on Fiverr” in text format more than once in the video so that the editorial team can see it clearly. As far as adding music, you can buy or obtain music in quite a few places including buying some original music on Fiverr.
ou don’t want to just strip a song from someone’s YouTube video since you will violate the copyright if you don’t have permission. You want copyright free music, or music that you have purchased rights to. It is easy to add music with free Windows Movie Maker if you are using Windows. I’m sure there are other free ways to add it, but that is the easiest way I know of personally.