There is a way to open video files on SMB network using "nautilus" of gnome/Unity.
After install nautilus, run KDE->type "nautilus" and Run nautilus.
(Or make shortcut for nautilus.)
There are some merits for using nautilus, first merit is it can be played just double click video files on two or more SMB network what has different user / password. No need to set user/password to VLC SMB setting, just need to login on nautilus access to target folder, and it can be remembered.
(Even the filepath / filename has CJK characters, it can be played. :-) )
Second merit is some other players not support network option can be play on network file without copying target files to local temporary folder, because natilus automatically mount SMB network.
I'm using Unity and KDE. Sometimes KDE package good for me, the other times Unity(gnome) package good for me.
I think it is better that choose good programs for purpose each time.
(Not only KDE, not only Unity)