Probably another newbie question, but I haven’t found an answer: I have separate audio commentary files (such as Directors’ Commentary) for a lot of the movies in my collection. How should I name them and where should I put them so that I have the option of playing them within Plex?
Plex won’t recognize external audio track files. For them to be available for selection within Plex you’ll need to mux those tracks into the actual video file. This can e.g. be achieved using an app named MKVToolNix