The clip comes from SCP: Secret Laboratory, the free multiplayer horror game by Northwood Studios released in 2017 and based on the SCP Foundation collaborative fiction universe. In matches, factions spawn, give orders and coordinate over radio as they try to contain or escape as SCP subjects. Short command lines like this one were lifted by players into soundboards and edits, where the serious military delivery contrasts with casual or messy gameplay. It remains popular because the order is clear out of context and instantly sets up an expectation of a trap.