===== Install AVIDemux =====
To use the debian-multimedia repos:

  # nano /etc/apt/sources.list

  deb http://deb-multimedia.org bullseye main non-free

  # apt-get update --allow-insecure-repositories
  # apt-get install deb-multimedia-keyring --allow-unauthenticated
  # apt-get update
  # apt-get install avidemux