MPlayer Teal Green Double Cross Error Message

[Leonard Chatagnier]

Hve posted on this related topic but no solution. Have
since installed Automatix and let it install
everything related to playing embedded videos but
still no solution. Related posts were:
 (Not)Playing Embedded Videos With Mozilla Browser
 Why Embedded Videos Wont Play On Linux? 
Am not experiencing user friendliness on this matter!
The actual message says "This page contains
information of a type(application/x-mplayer2)that can
only be viewed with the appropriate Plug-in."(exact
quote).
Of course, the mime type is listed in KDE's file
association table and I have added nsplugin viewer to
the top of the embedded list for all video related
entries.
What I would like to do is play embedded videos with
Mozilla browser(not firefox which plays; its too hard
on my old eyes) and using mplayerplug-in which has
worked well in the past on Debian distros.
If I can't get specific help on the setup(I think its
a setup issue) then perhaps someone could list a
thouough, detailed wiki that could guide me through
all the setup issues. Would appreciate specific help
and yes, I have googled much on this.
This is the only remaining important issue I have
using Kubuntu desktop and I'm impressed with the
otherwise user friendliness with the distro. Thanks
for any response.

Leonard Chatagnier
lenc5570 at sbcglobal.net