Changing starting directory for video players

["Edward C. Jones" <edcjones@comcast.net>]

I use Debian 8.0 (Jessie), amd64 port, and KDE.

Dragon Player has starting directory: ~Videos.
VLC has starting directory: ~
KPlayer starts at the last directory used.
KMPlayer starts at ~/Documents.

How do I change the starting directory for these video players? Which 
config files contain this information?