The Youtube is a demo of the Lens and a sort of tutorial for using it. It is short but covers the use of it and shows before and after while using the Lens. Thus you can really see what it can do.
As for the Lens, yes when you need wide angle it can provide that function. But you have to remember when using wide angle when you come in close to what you are photographing it can distort the edges of the photo.
So it is better to take wide angle shots from a bit of a distance back from the subject.
I'm sure in time the camera function of a Cell Phone will improve vastly. I've read where Americans are replacing their Cell's about every 1 1/2 years now, so with that turn over rate I'd bet the camera functions will grow better.
