I'm currently watching the video and he is approaching this as if some company would continue complete support with every functionality still available without any interruption. His idea of the "simplest matchmaking" are freaking lobby codes. He can't even fathom a future without Steam.
For him almost everything involves accounts and big companies and legal entities and central authorities. Stuff you do not need. Never ever. He is caught up on self made problems.
If you put into law that a game has to remain playable developers will figure it out. Either they are stupid and tie everything to central unchangeable entities or they will add a config file where you enter an IP address and call it a day. Capitalism will find the cheapest way to comply.