I did actually read this thread back when it first started, and it gave vibes of “I didn’t set up my Plex server properly – why is it not working the way I want?”
I can appreciate that you want to enjoy foreign-language media, but the fact you are needing to go look for subtitles and add them at the time you want to watch doesn’t make sense. Why add media to your server without the subs already there if you need them? The idea of a media server is the content is “ready to watch”.
Personally I would only obtain media with the subs included so I don’t have to monkey with editing or timing, even though I know how to do those. But if I had to revert to a “raw” file I’d go look for the get subs before adding it.
You should just use the normal item-level refresh from the normal (not-folder) view, like nibbles said.
I’m sure if you used the Subtitle Search feature built into Plex it would add the subs immediately to the content.
The problem is Folder View itself is antithesis to Plex as a concept, which is to divorce the media files and how they are organized on disk with how the content is presented and organized to the viewer to consume. The file structure is for Plex to understand what the files are, not for browsing really.
I’ve reviewed the thread again and I didn’t see where you explained why the directories are named after users. If you’re trying to segregate the files into collections tailored to each user there are three ways to do that, but if you have the files themselves already separated like this the BEST way is simply to make separate Libraries for each user. Use the directory with their name as the root directory for the library. If you have films you all enjoy then make a separate folder called “shared” or “all” or something, and add it as a second root directory to every library. People sometimes forget a library can be multiple folders, and a folder can be in multiple libraries simultaneously.
Bonus: With separate libraries everyone can set their own favorite poster/background art for the shared movies when viewed in their library.
Now you can just refresh the metadata on the one person’s library that changed, and only that small subset of your media will be checked instead of all the files.
Each user would have their own Plex account or a Managed User profile, and you can assign their personal library to their profile so they wont have to see the other Libraries.