[Bazooka_Joe]

Well, Microsoft finally developed the patch for Service Pack 1 users. This news is actually kinda old, but I wasn't aware of it until now:

[quote:360aa]327979: Recommended Update
Download size: 862 KB, < 1 minute
This update addresses the "Game Stops Responding (Hangs) or Quits Unexpectedly When Introductory Video Clip Is Played" issue in Windows XP, and is discussed in Microsoft Knowledge Base (KB) Article 327979. Download now to prevent your computer from not responding during video playback.[/quote:360aa]

Basically, this is the cure to the hiccup in Service Pack 1 that prevents you from playing smoothly in OpenGL games, and also the problems with OpenGL video. If you have Windows XP, get it from Windows Update.