You can determine this by looking in the first section of the QTW.INI file for the following line:
Video Hardware=Not directly supported
If this line is there, QuickTime for Windows is not optimized for your video chipset. If there is a "[video]" section, you may be able to turn the optimize feature on by changing the "optimize" setting, as shown below:
[video]
optimize={hardware|driver|bmp|raw|dib}
Of the possible settings (hardware|driver|bmp|raw|dib), hardware is the fastest and dib is the slowest. If this section or line is not there, "optimize" defaults to "hardware."
The LCD displays on laptop computers are notoriously unresponsive to rapid
screen updates. Try using an external monitor, if your laptop supports one.