The blackout window for in-country live coverage (in the UK being 14.45 to 17.15 on Saturdays) is nothing to do with EU Law. It stems from UEFA rules. Each member of UEFA needs to set a blackout window which encourages attendance at live games in their country. That’s why St Mirren TV is only allowed “outwith the UK”. Technically, games could be shown live without restriction mid-week, but it’s probably a ballache for the Uni to do that.