To start, let’s pull back the curtain a bit and affirm that movie critics are — and I believe this is the technical term — an incredible bunch of geeks. Just before the lights dimmed for the advance press screening of “You Can See Everything,” Nathan Fielder’s nearly three-hour documentary, the theater buzzed with the following behaviors: journalists discussed their nine-hour-long pregame rituals (“You rewatched the whole Hulu series??” “Also HBO and 20/20.”). Two men loudly strategized their bathroom breaks. One woman whipped a pair of fuzzy socks from her bag (this was my editor); another used a napkin to calculate how many mozzarella sticks she should allot per hour (this was me).