It's not just 3pm Saturday matches - there are Sunday and Weekday games (particularly later in the season) that are filmed and broadcast abroad, but not shown in the UK because (I think) Sky and BT only have the rights to show X number of games per season so some less attractive matches are skipped (and also some postponed games end up on nights that European games are on and UEFA don't allow them to be broadcast in competition to their games).
viewing restrictions. I live in los angeles where the two local baseball teams angels and dodgers games are all restricted from viewing on youtube tv.
It's not just 3pm Saturday matches - there are Sunday and Weekday games (particularly later in the season) that are filmed and broadcast abroad, but not shown in the UK because (I think) Sky and BT only have the rights to show X number of games per season so some less attractive matches are skipped (and also some postponed games end up on nights that European games are on and UEFA don't allow them to be broadcast in competition to their games).