So, my videoplayer of choice is VLC. Comes preinstalled with EOS, plays everything I need, works like a charm. I just installed Tokodon, which brings with it the mpv videoplayer as dependency (for embedded videos I guess). And now mpv wants to play all my videos. I don’t like this, not at all. Of course I can now go into each video file association and change it back to VLC, but I never wanted mpv in there at all - can I solve this more elegantly?
Check if MPV has been set in ~/.config/mimeapps.list. If so, change those entries to VLC.
Only where it is to be expected due to my manual changes:
[Added Associations]
text/plain=notepadqq.desktop;org.kde.kdeconnect_open.desktop;
video/mp4=vlc.desktop;org.kde.kdeconnect_open.desktop;
video/x-ms-wmv=vlc.desktop;org.kde.kdeconnect_open.desktop;
video/x-msvideo=vlc.desktop;org.kde.kdeconnect_open.desktop;
x-scheme-handler/mailto=userapp-Thunderbird-T6FLA2.desktop;
x-scheme-handler/mid=userapp-Thunderbird-T6FLA2.desktop;
[Default Applications]
message/rfc822=userapp-Thunderbird-T6FLA2.desktop
text/plain=notepadqq.desktop;
video/mp4=vlc.desktop;
video/x-ms-wmv=vlc.desktop;
video/x-msvideo=vlc.desktop;
x-scheme-handler/mailto=userapp-Thunderbird-T6FLA2.desktop
x-scheme-handler/mid=userapp-Thunderbird-T6FLA2.desktop
[Removed Associations]
text/plain=okularApplication_txt.desktop;
video/mp4=mpv.desktop;
video/x-ms-wmv=mpv.desktop;
video/x-msvideo=mpv.desktop;
As you can see I have already corrected the file associations for .wmv, .mp4 and whatever msvideo is.
This looks right, as far as I can tell. You must have something overriding this file. What desktop environment is in use? Check if you have a “default applications” menu in your DE settings.
Well, this is the plasma section, so surprisingly my DE is KDE 
This shows no entry for videos:
And then I am lost with the file associations per filetype (which I try to avoid, hence this cry for help)
I don’t think it’s possible, my case was the opposite, I had to replace the vlc.desktop with mpv.desktop, I used a sed command :
sed -i s/vlc/mpv/g ~/.config/mimeapps.list
No utility like in Xfce ?
