That's pretty amazing and exciting poker there! 4 of a kind on the river to win!

Help me on this: Announcers/poker players are always talking about "outs". In this scenario, how many outs did you have? You could have won only if you got a full house or 4 of a kind. That's assuming that he wouldn't be able to improve his hand on the river, and it doesn't look like he can. So 4 of a kind is 1 K, and full is 3 8s, 3 As, and 3 Qs. I'm thinking out loud by writing - 10 outs. Am I missing anything? Then they'll translate that to a possible winning % - 10 cards out of 52, so about 20% chance? Close?