ivicaivica
A video definitely renders either method useless, assuming a decent frame rate and quality. A PIN typed fast enough might be harder to track even on video, but I wouldn't bet on it. A jumbled interface might make it so a video would need to get a good view of the numbers. But that's neither here nor there.
I still think I'd rely on my method more, in the absence of better logic. I don't see how your anecdote runs counter to my argument, just because a bank or employer requires jumbled PINs doesn't mean that's the best method.