Is it? I just watched it several times in slow motion. I think that he hasn’t gathered the ball until just before he steps with his left foot. If that is the case then his left foot is therefore his pivot foot and it is a legal play. It’s only if his right foot was the pivot foot that it’s a traveling, which was not…

Yup, he very clearly limits himself to two long steps after picking up the dribble. Amazing and legal play.