At the bottom it said range 30 km and time "up to" 3 hours, which might mean a speed of 10 kph? That seems too slow to be interesting, at least after you've ridden it a couple of times. The videos were confusingly cut to hide something, which I'm guessing is the slow speed.
The E-Go Cruiser can do 18 miles or 30km and you can see plenty of videos at www.youtube.com/YuneecEGO We have nothing to hide and can reassure you that 12.5 mph or 20km/hr is fast enough and you can 'run out' a fall at that speed. At faster speeds you can't. This satisfies 90% of people, 90% of the time.