plex_playlist.yaml

script:
  play_plex_album_on_roku_tv:
    alias: Play Plex album on Roku TV
    sequence:
      # turn on the TV if it's not on
      - choose:
        - conditions:
          - condition: state
            entity_id: media_player.43_tcl_roku_tv
            state: standby
          sequence:
            - service: media_player.turn_on
              target:
                entity_id: media_player.43_tcl_roku_tv
            - wait_template: "{{ not is_state(\"media_player.43_tcl_roku_tv\", \"standby\") }}"
              continue_on_timeout: true
              timeout: "12"
      # switch to the Plex app if it's not active
      - choose:
        - conditions:
          - condition: template
            value_template: "{{ not is_state_attr(\"media_player.43_tcl_roku_tv\", \"app_id\", \"13535\") }}"
          sequence:
            - service: media_player.select_source
              target:
                entity_id: media_player.43_tcl_roku_tv
              data:
                source: 13535
            - wait_template: "{{ is_state_attr(\"media_player.43_tcl_roku_tv\", \"app_id\", \"13535\") }}"
              continue_on_timeout: true
              timeout: "15"
      # play the playlist using the playlist_name that was passed in
      - service: media_player.play_media
        target:
          entity_id: media_player.plex_plex_for_roku_43_tcl_roku_tv
        data:
          media_content_type: MUSIC
          media_content_id: '{ "library_name": "Music", "album_name": "{{ album_name }}"}'