First time through, it looked like a legitimate jump stop by NFHS rules, only moving backwards. There's nothing inherently wrong with that; three point shooters use the move all the time to get squared (they just don't typically move backwards).
However, the others are right, I see the left foot coming down after he gathered on the right foot. He jump stops off the left foot, but that's a travel by NCAA and NFHS rules.
I have no idea about NBA rules.
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