[Cowboyfan_19]

Both feet have to simultaneously touch down on the court paint for 3 consecutive seconds. Towns in the clip looks like one of his feet is out on a few separate occasions. At that point, all you need to do is raise the other foot that's in the paint off the ground by an inch & you reset the count.

All that being said, I've still always thought 2k was too exact on the 3 second rule. Its always been an exaggerated 3 seconds in real life, not actual 3 seconds