Okay, I will be devil's advocate on this one. The defensive player had clear, firm control of the ball and his right foot came down in bounds between the one and two yard line. The catch was completed at that point; not when he landed in the end zone. Within 2-2-7-a, "If one foot first lands inbounds and the receiver has possession and control of the ball, it is a catch even though a subsequent step or fall takes the receiver out of bounds". I feel that this would still apply at the goal line.
With that, if the catch is completed extremely close to the goal line and the action continues into the end zone, a touchback would be in order. The completion of this catch was not "extremely" close to the goal line in this instance.