When "elaborate multi-agency government conspiracy" and "off-by-one bug in non-critical section of code" are your two competing theories, both Occam's Razor and Hanlon's Razor (two important rules of reasoning) compel the selection of the latter. So it's not really "normal" (if by that you mean reasonable) for someone to assume that YouTube is elaborately bug free if that requires the existence of shadowy conspiracies that are unsupported by other evidence.
There seems to be two ways to apply Occam's Razor. The first, used by people actually tasked with investigating something, is to prioritize exploration of simpler explanations before more complex ones. The second, more commonly used by Internet bystanders, is to treat it like an iron law, immediately cut off all alternate avenues of inquiry and give people degrading labels. Occam's Razor is best as an investigatory rule of thumb and not a thought-terminating cliche.