Earlier quoted context omitted.
It really depends on the price. At 150k€ they're not worth buying, at 1€ plus taxes, deposits and various renovation works... Maybe. One might get a nice vacation house for cheap. One of such houses (not those shown in the video) was actually near the places where I grew up. Such place is nowadays decently connected (still sub-optimal, but decent). If somebody was forward-looking enough could have bought property for…
How would you ever get 1Gb/s over a copper last mile?
So, long story short: that's the advertised speed.