It's a travel...but it's razor close so it would be tough to catch in real time. This player is extremely quick and athletic and is probably capable of pulling it off legally.
One of my pet peeves is getting the ones that are slow and obvious travels. I made it a personal mission last season to call them (HS level) whenever I saw them. Unfortunately, I was on an island. Very few other members of my local assn. would call them (or anywhere in the state that I could find) so I abandoned it this season. It's an uphill battle for a hill that I'm not willing to die on. When in Rome...