How to make VLC my default video application in one command line ?

Just type this long command :

What this command really do ? First, it selects the "Mime Types" block from the vlc.desktop file :
grep "^MimeType=" /usr/share/applications/vlc.desktop

Then we remove the "MimeType=" header :
cut -d "=" -f 2

We've got all mime types in one line. So, we format the output in this way : 1 line = 1 mime type using ';' as the separator :
xargs -d ';' -n 1

Then we only keep all video mime types, throwing away all audio content for instance.
grep -e "^video/" -e "^x-content/video"

Finally, all these video mime types are associated with vlc, using the command 'xdg-mime default'

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