Where would you go to Bein sports ? Answer an app on a firestick
No they don't, nothing uses scart any more apart from old technology you may still have. Yes you can get a converter but were not cheap last time I looked
BHA cannot do anything to prevent a game being streamed, The FA, the Premier League, no league anywhere can do anything to prevent it.
if they could it would have stopped many many years ago, and not likely to happen anytime in the forseeable.