This is a great post to read in comparison with iambateman's [0]. You prefer Snapchat because it is a space where you are safe to be yourself, without worrying about parents/uncles/etc seeing you. But iambateman's point is that making videos for our friends is a performative event, and thus drives one to (a) be different from your actual self (more funny/interesting/alive) or, at the very least, to (b) act as you see yourself reflected in their eyes - to be that version of yourself that they expect to see. To go all philosophy 101 on it, this is more-or-less the basic question of existentialism, with Snapchat acting as a multiplier for temptations to inauthenticity.