The problem is how to put audio over video in iMovie when you use Mac or iPhone. Thus, many users prefer to add music to iMovie app from the downloaded files.
The default audio library is not good to use. Of course, you can also add copyright free music, voiceovers and audio clips to iMovie.
You can use iMovie to do most video and audio editing jobs, like clipping, merging, overlaying text, adding transitions and more.
