Automations.yaml

  - alias: "Media player paused/stopped"
    trigger:
      - platform: state
        entity_id: media_player.kodi
        from: 'playing'
        to: 'idle'
    action:
        service: scene.turn_on
        entity_id: scene.livingroom_normal

  - alias: "Media player playing"
    trigger:
      - platform: state
        entity_id: media_player.htpc
        to: 'playing'
        from: 'idle'
    action:
        service: scene.turn_on
        entity_id: scene.livingroom_dim