Sounds quite similar to Markov chains which made me think of this story:

https://thedailywtf.com/articles/the-automated-curse-generator

Still gets a snort out of me every time Markov chains are mentioned.

There should be an external hard drive full of portable game installs in some drawer that fits the time period.

Should easily kill a week.

Wow, that sounds like a decent start for an architecture.

I’m tempted to spin up a few Jellyfin instances to see how it might work…

JellyFed(eration) would be awesome. It should use an anonymous overlay network so federation is not limited to people you trust in copyright-zealous jurisdictions.

That’s the equivalent of leaving the door open and hanging a sign “Internet over there” pointing at a wall.

Programs don’t need to respect those registry keys. If you’re worried about internet access, set up a firewall.

Also, if you’re worried about malware, the damage is probably done before anything connects to the internet.

B stands for Billion (Parameters) IIRC