[Technologist]

Broadcasters tend to seek solutions that use international open specification.
Thus they use DVB specifactions (almost universally for DSAT
but for DTT the USA etc has has ATSC while Europe etc has DVB

In the uk we had have a great success by use the Freeview brand is only allowed on equipment which meets the D book published by DTG which constrains the broadcasters and CE industry .
Despite DTG doing a lot if work in Hbbtv (2) the Freeview play spec is a freevuew dice it.
And it would be expected(sadly) that everyone tv will issue its profile of DVB-I
(Of course Freesat has its own specication which is not publically available …and had to steer around some DVB. Non compliance by Sky )

So the uk broadcasters have international standards based system for delivery ..
Via terrestrial,and satellite emission and now with ip,delivery
which probably will be used for terrestrial emission as it moves to using telco modulation.
Post 2035 in the uk .

Fire stick and other things use proprietary means …..
as do most streaming platforms ….
Take your pick as to what you use ..my feeling is that content and its price will be important.