How to put music in your visual piece

Does anyone know the way that i can put some music in me video?

There’s a tutorial here(using some disturbing source material):

After adding your videos and/or images to one track:

  1. Press the ☰ menu button (top-left corner of the timeline)
  2. Pick Add Audio Track
  3. Drag your music file into the Shotcut monitor or playlist and from there drag it to the audio track

Here’s a less disturbing video tutorial: