Oh, you can not zoom while filming video in FullHD?
I assume that's because in FullHD, you already use all possible pixels, and it's not possible to zoom in and keep it Full HD.
Dunno, I never photo, nor film with my old note. I didn't even know that the photo app worked. Last time I tried it some years ago, it crashed, and it was a known error, so haven't tried since.