I think i have an idea of what's happening. The air outside is actually toxic and the managers of the Silo have set up an elaborate system to discourage ppl from venturing outside. The screen is a lie but for a good reason. If this hard drive is from the latest rebellion, the one that erased the previous world's history, the people who made it are either the villains or ignorant about the atmosphere outside.
I aslo think there are or were multiple Silos. There has to be at least one other...that white haired cac went from acting like he was the boss an episode ago, to panicing at the "18" keychain flashes. If there are multiple Silos, each silo must answer to one and/or each Silo serves a purpose to humanity.
This basically a Vault life, pre-Reclamation Day. Only difference is, I don't think these Silos ever plan on leaving the Silo....i think there were Vaults like that in Fallout.