well the key is data centers are needed to store all those videos, and that's expensive app itself is very simple the way android works (i'm no so big on iOS) is every app runs in a container and android is pretty secure, if the app is spying it could be solved by the operating system, but it still doesn't make much sense to me - they make the chips they can insert spyware into the firmware no problem - i'm fairly sure the snowden leaks revealed all this