The film analogy is exactly the analogy that Jack Sarfatti used in his popular explanation of the many worlds theory titled Space-Time and Beyond. I also had trouble limiting the analogy to a stack of parallel film strips. The three dimensional analogy sort of opened things up. Each counterpart self is like a strobe light illuminating Mickey Mouse dolls in some chosen order. In fact there are an infinite number of counterpart selves choosing an infinite number of next moves.
Folks wonder about how their counterpart selves are connected.
I use another analogy here. Imagine that a cell has a sort of consciousness. Each cell has some sort of purpose or inner direction. It is easy to imagine that this is the collective consciousness of multiple counterpart selves. In my understanding, the Word is vibration.