Как открыть все видео файлы с VLC

Можно щелкнуть правой кнопкой по желаемому видеофайлу, затем выбирают "Proprieties"> "Open with" "VLC".

Также можно отредактировать mimeapps.list в ~/.local/share/applications и добавьте:

video/dv=vlc.desktop;
video/mpeg=vlc.desktop;
video/x-mpeg=vlc.desktop;
video/msvideo=vlc.desktop;
video/quicktime=vlc.desktop;
video/x-anim=vlc.desktop;
video/x-avi=vlc.desktop;
video/x-ms-asf=vlc.desktop;
video/x-ms-wmv=vlc.desktop;
video/x-msvideo=vlc.desktop;
video/x-nsv=vlc.desktop;
video/x-flc=vlc.desktop;
video/x-fli=vlc.desktop;
application/ogg=vlc.desktop;
application/x-ogg=vlc.desktop;
application/x-matroska=vlc.desktop;
audio/x-mp3;audio/x-mpeg=vlc.desktop;
audio/mpeg;audio/x-wav=vlc.desktop;
audio/x-mpegurl=vlc.desktop;
audio/x-scpls=vlc.desktop;
audio/x-m4a=vlc.desktop;
audio/x-ms-asf=vlc.desktop;
audio/x-ms-asx=vlc.desktop;
audio/x-ms-wax=vlc.desktop;
application/vnd.rn-realmedia=vlc.desktop;
audio/x-real-audio=vlc.desktop;
audio/x-pn-realaudio=vlc.desktop;
application/x-flac=vlc.desktop;
audio/x-flac=vlc.desktop;
application/x-shockwave-flash=vlc.desktop;
misc/ultravox;audio/vnd.rn-realaudio=vlc.desktop;
audio/x-pn-aiff;audio/x-pn-au=vlc.desktop;
audio/x-pn-wav=vlc.desktop;
audio/x-pn-windows-acm=vlc.desktop;
image/vnd.rn-realpix=vlc.desktop;
video/vnd.rn-realvideo=vlc.desktop;
audio/x-pn-realaudio-plugin=vlc.desktop;
application/x-extension-mp4=vlc.desktop;
audio/mp4;video/mp4=vlc.desktop;
video/mp4v-es=vlc.desktop;
x-content/video-vcd=vlc.desktop;
x-content/video-svcd=vlc.desktop;
x-content/video-dvd=vlc.desktop;
x-content/audio-cdda=vlc.desktop;
x-content/audio-player=vlc.desktop;
video/x-flv=vlc.desktop;

Ссылка: 1.