Theme music – iMovie Review

If I press a video I want for theme music give me music for that one video. If I wanted the whole thing I would’ve asked but I didn’t SO DON’T GIVE ME IT????✌??? Every time I press a video I want to put theme music on instead of giving me theme music for that one video it gives me theme music for the whole movie I even tried splitting and deleting that didn’t work please fix This other than that great app on question how do you edit like professional youtubers or do they use another app if so which app is that
Review by reveiw superhero on iMovie.