Thanks Sleepless,tried free trial of Nero 7, didn't help. Now Realplayer can't play those. Exactly the file designation is hdtv xvid bia.avi. BUT reinstalled my VLC and AMAZING to see them play properly this time. Will look into MPlayer later.
So those HDTV files do work.
But VLC as default player does not launch video from Limewire panel. Must use Real for that to work. (ie change default in control panel).
PS. Maybe VLC works now because I selected full installation this time instead of default normal, if I recall.