I see this is his first upload. You can add a music overlay to that vid on youtube. There are thousands of tunes to select from. (Click on “Audio Swap”) Adds a lot to the end result.
You must be logged in as the person who loaded the video. Click on your video and the Audio Swap button will be at the top of the screen. Click on that. You can browse and preview the music. When you find a track, just add it. Takes a few minutes to update.