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: As explained by Adobe , .mkv files are open-source containers that can hold unlimited video, audio, and subtitle tracks. This is why they are often used for "Extra Features" like director's commentary or multiple language tracks. Download Extra host I15FMHD72HRFD mkv
: When downloading media, "Extras" usually refer to bonus content such as deleted scenes or "making-of" featurettes. If you are trying to organize these files for a media server like Kodi or Emby, tools like tinyMediaManager are frequently used to correctly tag and link these sub-files to the main movie. Are you trying to or having trouble playing