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running the vlc snap is not the same as having vlc installed directly on the system. A vlc snap is confined into the snap environment, thus direct access to the file system is not permitted by default. In other words, vlc snap is not going to work the same as vlc installed native to the system.snap is snapcraft, a special confined secure environment for these snap development software. snap info --verbose vlcOverriding a strictly confined snap like vlc with --classic is possible.