You can do this by right clicking on the shortcut, and then selecting the properties option. You'll then see a text field that has a directory listing, something like "C:\westwood\emperor\emperor.exe". You'll need to place a +w at the end of this line, resulting in "C:\westwood\emperor\emperor.exe +W". This should remedy your video choppyness during movies.
un petit plus, on verra ce que cela donnera