[CentOS] bad text under KDE and C7

> 
> I tried the live DVD from which I installed C7.

I meant to use a live DVD from some other distro so that it had
differently compiled drivers - the idea was to eliminate (or otherwise)
the drivers from CentOS 7.

> It would not do videos at all.
> It claimed it did not have mp4 codecs.
> It made the same complaint about avi and flv files.

That's mainly because they are non-free codecs so aren't included by
default.

P.