Afraid it really is just you
First, are you using VLC 0.8.1? If not, please try it. Second, if you had a previous installation of vlc, check to see if there is a vlcrc file, and delete it (there is a FAQ off of the main VLC page, which tells you where it is located).
Third, you may just be running into a series of files that have codecs that aren't supported, real media, IV50, whatever. Try downloading:
ftp://streams.videolan.org/streams-vide ... usic26.mpg to your pc, see if it plays OK.
Open View -- Messages before trying to play a file that gives you trouble (no video). Let it run a few seconds, then Stop it. Look in the Messages window -- if you see something like "main: no suitable decoder for..." that means what it says -- it is a video or audio CODEC that VLC doesn't handle. There's a Features List, accessible off of the main VLC page, that lists formats that are supported.
Good luck!