Just a list of FREE video codecs, you'll probably need one of them after you finish editing your video. And by free i mean NO shareware, addware or such shit.

WINDOWS FREE VIDEO CODECS/ENCODERS

• ffdshow (http://ffdshow.sourceforge.net/tikiwiki/tiki-index.php)
  Video for Windows and DirectShow codec based on VFW code from XviD project and using libavcodec library from ffmpeg project for compression. Few other compression libraries are supported too.
• Ligos Indeo Codec 5.11(http://www.9down.com/modules.php?name=News&file=print&sid=2981)
  A little older version of this codec so it's free ;-)
  Video codecs originally developed by Intel, but later taken over by Ligos. Used widely throughout many years. Latests versions provide good picture quality and many different bit rates.
• XviD (Koepi's build http://www.koepi.org/xvid.shtml or Nic's build: http://nic.dnsalias.com/)
  XviD is a very popular codec these days, and is used often. Modern builds can also play back that various DivX encoded files, so it's good to install one of these first ;-)

If you want to add one, just post a reply and i'll add it. This list will grow as time passes. Still needs Linux and Mac section.