Just like Gooner said about Oz
That’s how it works in the US and Canada. US has HRTV and TVG Network, each run by a different online horsebook. Online horse betting in Canada is run thru(i believe) Woodbine, the track in toronto, which also seems to control the video feed of racing in ontario.
I assume all the production equipment is already at the tracks, it shouldn’t be too hard for a new network to be formed. Every college basketball conference in the US seems to have it’s own TV network in partnership with small production companies.