What are the odds, please? You're much better at this stuff than I am.
It depends how many times you make the bet in that minute... If you look at the screenshot I posted you'll see he bet 15 BTC on "lessthan 1000" three times just in the area covered by the screenshot, and won the 1st and 3rd bets. There were lots more attempts where he lost. Here's a list of all 32 times that address bet 15 BTC on lessthan 1000, with the result:
Sat Mar 2 07:35:21 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 09:11:23 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 13:01:48 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 16:59:48 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 17:07:59 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 17:23:39 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 17:27:30 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 17:27:30 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 18:10:48 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 18:10:48 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 18:52:05 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 18:52:05 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 19:21:47 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 20:22:07 2013 <1000 BET 15.00000000 WIN 944.52154000
Sat Mar 2 20:23:11 2013 <1000 BET 15.00000000 WIN 944.52154000
Sat Mar 2 20:32:09 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 20:32:09 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 20:35:10 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 20:35:10 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 20:35:10 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 21:31:29 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 21:31:29 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sat Mar 2 21:31:29 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sun Mar 3 03:46:06 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sun Mar 3 03:46:06 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sun Mar 3 04:08:33 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sun Mar 3 04:08:33 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sun Mar 3 04:46:38 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sun Mar 3 05:00:02 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sun Mar 3 05:23:37 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sun Mar 3 06:36:01 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sun Mar 3 06:45:24 2013 <1000 BET 15.00000000 LOSE -14.92550000
Sun Mar 3 07:54:18 2013 <1000 BET 15.00000000 LOSE -14.92550000
Mon Mar 4 18:05:24 2013 <1000 BET 15.00000000 LOSE -14.92550000
Tue Mar 5 19:33:22 2013 <1000 BET 15.00000000 LOSE -14.92550000
But let's work out the odds of winning twice out of two bets.
There are 65536 numbers. 1000 of them win. So it's a 1000/65536 probability of winning each bet. That's a probability of 0.0152587890625 or 1 in 65.536.
For 2 in a row, you have to square that, so it's a probability of 0.0002328306 or 1 in 4294.967296.
So the odds are 4293.967296 to 1 against of winning two "lessthan 1000" bets in a row.