Stupid question I know >>, but how do you make a video that has music playing? Like you know, when videos have a song from a movie playing. I mean the one with a picture or pictures in it.
There are no stupid questions, only requests for that which we might not know as of yet.
Video editors are a fantastic way to produce slide shows or edit clips of video in a particular way so as to tell a story. Part of their function is the ability to import music on the "Time Line". Your can adjust "Fade in" and "Fade Out" as well as actual volume and other audio functions (Reverb, Echo, Tempo . . . Etc.)
The free ones are extremely limited but the mid tier are affordable and intuitive (especially if you review on You tube first to see tutorials)