It's inevitable that there'll be *some* delay before video frames make it to the seat-back displays, probably much greater than the delay pilots see on their MFDs. I don't know much about the A380 entertainment system but the feed may well go via a hard drive on the central server, and the in-seat part of the entertainment system probably buffers some frames ahead of time as well. Even a barely perceptible half-second delay is 120 feet at 140 knots. I don't think it's fair to critique these landings as "short" without having more information about the display lag or having other evidence as to the touchdown point.
I was tending to critique the landings by the very loud crash sound and the cameras going out of control. A380 apologists.....sheesh