Mass is too high up for aggressive braking. It does not look like he had the gear raked forward but that is a really nice cub and a dang good pilot. Everybody makes a mistake once or twice. I bet he will be back up and running in time for Valdez.
I feel sorry for the guy. Looks like a nice experimental Cub with slatted wings (and new double slotted metal flaps??) and uber-extended gear to take advantage of said wings. I'd surmise the plane was optimized for ultra slow high angle of attack landings, not wheel landings.