I watched the first 8 minutes of the video; I especially noted the diagrams of servers and clients early on.
My job (full-time) is working in IT support for a large manufacturing company. Keeping servers running is, quite literally, what puts food on the table.
When a gaming company decides to devote servers to hosting a game, like an MMO, it is an investment. It's not free.
Even if the servers are located with a cloud provider, using someone else's hardware, it's not free.
Every company needs to decide about the useful life, the return on investment, for keeping X number of servers running to allow people to play an old game. So, what happens when a company decides to stop running the servers for a game after 5, 6, 7 years? The game dies.
More importantly, who gets to make the decisions about when to turn off the servers -- a government entity, or the company that owns the intellectual property?
Another category - sports games, where one can do online competitions with other players; other games have campaing modes. FIFA 20xx, NFL 20xx, Football Manager, The Show. What's the expected liftetime of those games? Is anyone still playing Madden 2010? Why should gaming companies be compelled to spend money running servers for a trickle of users?
In the video, the narrator speaks a lot about ownership of software. I'm glad he's talked to lawyers/attorneys/barristers, because that seems to be the core of this question. If I spend money for an online game, I'm paying for the ability to play it as long as the online infrastructure is working. If I spend money for an offline game, I'm paying for the ability to play it as long as *my* infrastructure is working. I'm not a legal expert, but those seem like two different scenarios to me.