VLC HowTo/Make VLC the default player - VideoLAN Wiki
Trying to change the default audio and subtitle tracks for batches of mkv files at a time with a script template that I don't know how to fill out. : r/mkvtoolnix
How to Change Default Audio/Subtitle Track in MKV without Remux?
How to Change Default Audio/Subtitle Track in MKV without Remux?
How to Change Default Audio/Subtitle Track in MKV without Remux?
How to Remove an Audio Track from an MKV File
HandBrake Documentation — Audio and Subtitle Defaults
HandBrake Documentation — Audio and Subtitle Defaults
How to delete/switch default language in a MKV file - VideoHelp Forum