That person created NFC tags that can be scanned to automatically start a game when the tag is scanned.
The tag is added to a physical small box, cartridge-sized
Regarding ownership of the games files, they made a point about it at some point in the video, saying that they now only buy games from GoG to be able to just store the .exe files, DRM-free.
One downside of this with ADHD is its way too easy to have thousands of games you only ever play 1% of.
When i have my ps2 out, the disc is in and I’m invested. Unless I get really annoyed I’m not gonna swap in another game. With an emulator or something like an ever cart, its 1 button away from a menu with 1000 games.