Plex

  1. https://support.plex.tv/articles/200220677-local-media-assets-movies/
    1. https://support.plex.tv/articles/202934883-cinema-trailers-extras/

Extra

  1. https://forums.plex.tv/t/tv-series-dvd-special-features-extras-behind-the-scenes-interviews-trailers-etc/177179/17
  2. https://support.plex.tv/articles/200220677-local-media-assets-movies/
  3. https://forums.plex.tv/t/organizing-special-bonus-material/172798