I am into LED displays, and thought of flipdots as rather antiquated, but I hadn't realised that they are fast enough for video !!
It looks like some of the dots get stuck, which I heard was one of the drawbacks with these displays, but I would love to play with these if I had time / and loads of money.
From the Polish company that makes them
A board 14×28/0.53? is listed at 450 EUR.
I am sure there is a way to drive them with an arduino, but at 3am my brain is not getting round it !
The same company mentions ardunio for its driver http://www.flipdots.com/flip-dot-boards-xy5-14x28.html#.ULQUMGdaf9U