You are right with the firmware lock, but this is a straight-out scam if you ask me, these were supposed to be "manufacturer refurbished", the ones in the video don't look anything like it, in fact, REAL refurbished miners are a lot more expensive than clean used miners, a while back used S9js were going for $250 while the refurbished once were going for at least $400, but those looked as good as new, no scratches, no lost screws, everything seemed like brand new, the miner in the video is a Used Miner with C- condition, selling it as a refurbished piece is nothing but scam IMO.