You’re almost totally out of compliance for naming and structuring TV Shows:
https://support.plex.tv/hc/en-us/articles/200220687-Naming-Series-Season-Based-TV-Shows
(your file names are at least partially correct - congratulations - but you may want to go full compliance mode - I would)
One thing you should know and will give you a great advantage when naming and structuring TV Shows is that complete capitulation to Plex’s naming/structuring standards for TV Shows is the ONLY way to achieve anything that can be called ‘reliable’. The first step in this process is:
- use FileBot - it will go to TVDB and get the name of the show they’re using, then in two seconds name all your stuff correctly, or
- go to TVDB yourself, get the name and rename your files to match TVDB.
Dragon Ball Kai @ TVDB: ドラゴンボール改 - TheTVDB.com
“Dragon Ball Z Kai” will also work (I actually tested with this naming).
My test files - one each for Season 01 and Season 02 - produced instant, fully populated matches using this exact naming/structuring:
A TV Show Library
…Dragon Ball Z Kai\ <— your use of (2009) isn’t necessary, but it probably won’t hurt either (probably)
…Season 01\ <— you have absolutely not got these right - and you will have to comply (Season 1 will work)
…Dragon Ball Z Kai - S01E01.mp4
…Season 02
…Dragon Ball Z Kai - S02E01.mp4
FileBot (link in my signature) can handle that for you automatically or manually in seconds.
What FileBot can’t do is remove possible embedded metadata in the Title Field of MP4/M4V files ( I use MP4 files - stripped of all metadata). Plex will read this info and prefer it over a perfect file name/structure (you don’t have any of those yet), but you can combat that situation by moving Local Media Assets to the bottom of every agent list you can find. All tabs in TV Show and Movies here:
https://support.plex.tv/hc/en-us/articles/200241558-Agents
Just drag LMA to the bottom of the list and drop it.
If you do have embedded metadata this will cure any potential issues, if you don’t it won’t matter. LMA will do what it has to from the bottom (I also have LMA at the bottom of my Agent Lists). If you don’t use MP4/M4V files don’t worry about it - if you ever want to use MP4/M4V files, do worry about it.
Renaming/restructuring is best performed OUTSIDE the library and you’ll need to write a new bundle for the show so The Plex Dance® was invented:
The Plex Dance®:
- remove show from library - Yep, the whole thing
- update library
- empty trash
- clean bundles
https://support.plex.tv/hc/en-us/articles/200392106-Library-Actions <— update library, empty trash, clean bundles - bring names and structures into compliance (FileBot is your friend)
- replace corrected show into library
- update library
All Steps. In Order. No Shortcuts.
A Partial Plex Dance® is as good as no Plex Dance® and could be called something, but it ain’t The Plex Dance®. The goal is to create a brand new bundle with all the right stuff in it and the only way to do that is to destroy the old bundle (clean bundles) and write a new one.
This can be called ‘movement’, but not ‘Dancing’ and it’s certainly not The Plex Dance®:
