YSU at UMass men's basketball game video. (Clip Added)

[Lotto]

Originally Posted by JetMetFan

RULING: B1 is entitled to the position obtained legally before A1 left the floor. If the ball goes through the basket before or after the contact occurs, the player-control foul cancels the goal. However, if B1 moves into the path of A1 after A1 has left the floor, the foul is on B1.

In the clip, though, wouldn't you say that B1 is already in the path of A1 with LGP before the try attempt starts? B1 certainly does move a couple of feet laterally after A1's try begins. Is any movement laterally acceptable? What if B1 just slides one foot a few inches over? Block or charge?