QuickTime HD H.264 codec tip
Here is a tip for all those people that want to play those QuickTime HD clips (the ones that use the new H.264 codec). You can play them with the K-Lite Mega Codec Pack. Download the files to your harddrive. Then simply rename the files from .mov to .mp4. The required codecs are: Haali's MP4 splitter and ffdshow (for H.264 and AAC). Playback will be faster and better than with the new QuickTime 7!
(from K-Lite Codec Resource Site)
I highly recommend installing the Mega version, as long as you read the instructions during installation. I can't remember the last time I had to install Realplayer or Quicktime.