Some college kids at Parks College did a simulation in a trainer and set touchdown for 125 mph, then raised the speed to 140 mph, so as to avoid a stall. The book states landing speed is 200 kph, which is 124 mph. Take off is 250 kph, which is 155 mph. Variables would alter the speeds somewhat. I believe that the black box will reveal this detail.
Not trying to be a party pooper. ;o)
Well, my 0.36 second timing is highly suspect. I tried timing a longer interval, and measuring the length of the plane on the screen for comparison. This time I got 2.28 seconds to go 10.5 cm on the screen, where the plane measures 3.0 cm. This gives 0.65 seconds, and revises the speed to 230*0.36/0.65 = 127 mph.
If done properly, this sort of video analysis can can yield pretty good results.