First off, I should like to begin by explaining that...I like it! I myself have experienced the tetris effect, and your idea makes a lot of sense. What I don't agree with is that a simple animation could adequately exert the effect. I believe that a major benefactor to the effect is the involvement of your brains logic centre when playing a game, complex or simplistic. Simply watching a video constantly repeated does not seem to me that it could/would very well invoke TTE

I suggest, perhaps, you experiement/research the effect moe extensively?