Video is here : http://www.youtube.com/watch?v=fPF6OYQ06uc
This technique can't be used in Cycles for now.It does not allow add driver on MovieTexture.
In many cases, it's easy to use just keyframe. but some cases, it's useful to rig video texture. Especially, a rigged character like ink face man in movie Watchman.
MovieTexture's frame is automatically advanced according to global frame. I couldn't find a way to prevent sutomatic frame advance of movie texture. So, i decided to compensate the global frame from affected movie frame.
WOW!!!! AMAZING!!!!!!!!!!!!!!!