i know that the host broadcaster controls the picture/replays and feed it supplies. my point is that bbc takes that feed (obviously filmed in at least 4k) and outputs at 4k online but also a clearly higher quality in the bbc hd freeview/freesat channel than itv do on their hd channel.No clue, but FIFA and UEFA own the feeds and they are licensed out.
Remember when the BBC came into criticism for what the showed with the Eriksen incident last summer? It was either show the live feed or cut back to the studio with no one in it.