OpenCV Lucas–Kanade Optical Flow Method

[KaiL]

I want to use this method like the person in this youtube video but I have no idea how. http://www.youtube.com/watch?v=4TYJGvCeeC4&feature=related
So could anyone gives some idea on how I could go about

[webJose]

http://en.wikipedia.org/wiki/Lucas%E2%80%93Kanade_Optical_Flow_Method

That's the method explained. If you cannot make out what the method is from that then I'm afraid that the task is just not for you.