Hier geht es ja um Serien, da ist eher das hier zuständig: https://support.plex.tv/articles/local-files-for-tv-show-trailers-and-extras/
da drin steht auch
Certain clients do not yet fully support TV extras but keep an eye out on our forum as our support pages will be updated once official support is available. Currently, the only clients that fully support extras at all levels are the mobile iOS and Android apps. Other apps like the Web client, Android TV, Apple TV and Roku have limited support while the modern TV interface for Smart TVs does not yet have support for any local TV extras.
Wobei sich das kürzlich geändert hat. Aktuelle Support-Matrix hier: Display tv-show extras for shows, seasons and episodes in all apps - #2 by tom80H
Alternative zu Obigem wäre nur die ganz klassische Methode, alles in die Staffel 00 zu verbannen.
