The source package of mkvtoolnix has an examples directory with some important files mentioned in it's own documentation. I believe media-video/mkvtoolnix should provide them. I'm attaching a patch to mkvtoolnix-1.6.0.ebuild to include the examples directory in doc/mkvtoolnix.
Created attachment 74001 [details, diff] Patch for mkvtoolnix-1.6.0 to include the examples directory.
Thanks, I've updated the ebuild in CVS.