home-assistant/packages/plex.yaml

automation:
  - alias: Dim lights for movie
    action:
      - service: scene.turn_on
        entity_id: scene.dimmed_brightness
    trigger:
      - platform: state
        entity_id: media_player.plex_ps4
        to: playing
        from: idle
    condition:
      - condition: state
        entity_id: light.living_room
        state: 'on'
      - condition: template
        value_template: >-
          {{ state_attr('media_player.plex_ps4', 'media_content_type') == 'movie'}}
  - alias: Restore lights after movie
    action:
      - service: scene.turn_on
        data_template:
          entity_id: >-
            {% if is_state('sun.sun', 'below_horizon') %}
              scene.nighttime_brightness
            {% else %}
              scene.normal_brightness
            {% endif %}
    trigger:
      - platform: state
        entity_id: media_player.plex_ps4
        to: idle
        from: playing
    condition:
      - condition: state
        entity_id: light.living_room
        state: 'on'

group:
  Plex:
    view: yes
    icon: mdi:television
    entities:
      - group.plex_players
      - group.plex_automations
  plex_players:
    name: Plex
    entities:
      - media_player.plex_ps4
  plex_automations:
    name: Automations
    entities:
      - automation.dim_lights_for_movie
      - automation.restore_lights_after_movie