I wanted to host a Minecraft server for some friends, so I got cobbled together a PC out of some spare parts and put Ubuntu server on it. Over time I added an emby server and tools to get media for the emby server and that was good for a few years. Then I moved and had some more space and fell way down the rabbit hole of used enterprise gear.
The gist of it is that they are making The Making of Karateka. Which appears to be basically the same thing as a director commentary for a movie but a game. You can play different versions and jump into the game during recorded bits.