[Adam]

Originally Posted by Rob1968

The context is established with the initial statement of4-44-3 . . . After coming to a stop and establishing a pivot foot: - which the player does at the 1:27 mark. Then, having moved the left foot rearward, she jumps (both feet leaving the floor) and alights on the left foot, before releasing the ball.
I agree that in real time, this move is rarely called a travel. A completely clean - legal - drop-step would involve the non-pivot foot being in contact with the floor, before the pivot foot is lifted. Indeed, if that is the case, until the pivot foot touches again, it cannot be a travel.
Yes, on a normal drive to the basket, at a run, both feet are off the floor three times, without the action incurring a travel violation.
This entire sdcenario is not the main subject of the OP, in as much as a jump-stop is quite a different move.

My point is if the rules defined a jump the way you suggest, then a layup as normally performed is a travel. There's a difference between a step and a jump. It's a judgment call, but the rule doesn't require the drop step be performed as you say, it prohibits a player from hopping while keeping the pivot foot off the floor. Imagine an aborted jump shot where the player keeps it and lands on the non-pivot foot. Without this rule, that would be legal.