Huh. I remember hearing about a camera which did this at one point (it was a setting, I recall), so there's certainly some market for this as a feature. Not sure if it coincides with iPhones (I would find it awkward to hold one up and point it at stuff continuously), but it might.

Your website looks great, I think. You might want to move the "on sale" sticker in front of the iTunes link, though - it just looks a bit odd as it is. Replacing "Never edit your videos again" with "Never miss a scene again" or "Never miss a moment again" (a slight rephrasing of the heading for how it works) could also work better, as well as making it more obvious what the app does on first glance.

I'm sure that others will have more and better advice, though.