After the feedback I got on my tests I have come up with this as my final composition. I have used the idea of an abacus with the tiles on the bars. This would be the final shot of the animation after the tiles have rotated. I think the shadows really help show that each square is a tile as opposed to a hole with footage behind. I have also changed the colour of the type to relate to the footage in each row. I think this has worked well and after softening the shadows and reshooting some of the footage I will be ready to render.