So i guess some of you know Fahrenheit Indigo Prophecy (or at least those games which can be played on dvd players

I don't know the script language or anything, but I'd like to have something like in my games, and I geuss it can come handy for the others too. So any solution?
So: there is a video file playing (fullscreen), and at some moments an indicator flashes on the screen (that is not needed in the script, because it can be created in the video editor program). It should check if you pressed the correct key in the right moment or not, and if not, it should lead to another frame. And because at some slower computers the videos are not loaded in immediately, the countdown to the first moment should start when the video is loaded in...
For me it seems complicated, but i hope it can be solved...