In Pennsylvania, I believe liquor stores do have to scan ID for most purchases.
Bars don’t HAVE to scan. The age threshold is fairly arbitrary. That said, there are companies who do contract stings/spot checks at bars (contracted by the owner of the chain, usually) to make sure they’re carding everyone.
One of my friends lost a job because of said sting by an 35 year old employee (who definitely looked over 30) and a zero tolerance policy for failing said checks.
So it makes sense to me that the bar wouldn’t provide alcohol to anyone without ID. That’s how they were trained.
I think the voiceover was added for YouTube, but I’m pretty sure that footage came from a game in 1991 “Zero Wing”
https://en.wikipedia.org/wiki/All_your_base_are_belong_to_us