How do I add a video clip into a video without replacing audio?

I have a long video of reindeer singing and I want to replace some footage of the reindeer with other video without losing the song. Cannot see how but am very new to Shotcut!

EDIT: Just mute the audio of the new clip.

Thank you, very much.

Here I’m define window movie maker to replacing audio.

  1. First, download and run it. Click Add videos and photos to import video.
  2. Click Edit tab > Video volume to turn off the sound by draging the slider to left.
  3. Click Add music to import the targeted music to Windows Movie Maker. You can select Add music or Add music at the current point.
  4. Click file icon in the top left corner to save video. Choose Save movie to export the targerted file.