As I recall, the game wasn’t even broadcast live.......but I clearly remember Jim McKay teeing it up, he couldn’t contain his excitement, even though the game hadn’t been shown yet....But I remember there were rumblings even before that indeed the US had won, even though we couldn’t be completely sure until the game was broadcast.
Of course these days, it would be impossible to keep the result under wraps, like that.
Al Michaels quote for the ages “Do you believe in miracles”!