What is the explanation for the 3 second lane violation?

Answer 1

The 3 second call in the lane does not start until the offense has brought the ball into the front court. At this point if a player spends 3 or more consecutive seconds in the lane, they are violating the 3 second rule. There is no three-second count during rebounding action or during an out-of-bounds throw-in. The count on a player in the restricted area is suspended when that player begins to try for a goal (shot).

Answer 2

if you have both of your feet in the lane for three seconds, it is the other team's ball, which would be imbounded at the baseline