I'm not sure about this option, the stock camera has this option under video settings, while the Nokia camera doesn't, does it mean Nokia camera doesn't have it or that it simply can't be disabled?
Huh, I just ran into this. I don't think I had this on my 1520 until recently when I reset my phone. So with this continuous focus tracking on, how do you focus on a subject that's not in the center?
Tap on the screen on that object to make it focus.