I don’t care if it’s legal or not this will be called a travel in college ball
Legal in the NBA because they allow the gather step. Not legal at any level below that (except FIBA). As mentioned, the player's pivot foot is the left foot when the dribble ends (two hands on ball ends the dribble). As soon as the left foot returns back to the floor, a travel would be the correct call. The jump from left foot to right foot is perfectly legal.
maybe i am old school , but when he goes up ,and then comes down and still has the ball that is called a violation. unless the law of gravity is repealed this is a travel