A traditional Glasgow tenement is owned flat by flat, while the roof, the close and the external walls are held in common. Anything that touches those shared parts is a collective decision, usually taken by the owners together or through a factor.
Television has historically depended on exactly those shared parts. A communal aerial on a tenement roof serves the whole building, and when it ages or fails, repairing it means agreement among the owners and a shared bill. Fitting an individual satellite dish raises the same question from the other direction, and on a listed building or in a conservation area, of which Glasgow has many, it may not be permitted at all.
IPTV takes none of that route. It needs the broadband connection already coming into the flat and nothing else: no aerial, no dish, no cabling through the close and no agreement from the other owners. What happens to the communal aerial becomes, for television purposes, somebody else’s problem.
Full fibre has reached much of the city, though it has arrived neighbourhood by neighbourhood rather than all at once, and older buildings are sometimes later in the sequence. This matters less than it sounds: a standard broadband connection carries high-definition streaming comfortably, and HEVC keeps the requirement modest even on a connection that is not the newest available.