High quality video in this site is encoded in the DivX format.
In order to watch DivX movies, you'll have to download its codec (the element that allows you to watch films that are encoded in DivX). Download of the codec is free. Installation is simple and will only take a few minutes.

Download DivX for PC
Download DivX for Mac OSX

Streaming video files in this site are encoded in Windows Media 9 format. They are encoded in relatively low resolution, so you can watch them almost instantly (depending on the speed of your internet connection). Windows Media Player is pre-installed in most computers, but you can also dowload it here:

Download Windows Media Player 10 for PC
Download Windows Media Player 9 for Mac OSX

Cross-platform media player. If you are still experiencing problems with watching the video then try VLC (initially VideoLAN Client). It is a highly portable multimedia player for various audio and video formats (MPEG-*, DivX, mp3, ogg, etc.) as well as DVDs, VCDs, and various streaming protocols. It works for ALL operating systems.

Download VLC for all operating systems