I don't think the people in the video are abnormal. Perhaps atypical but not extreme.
My 20 something son thinks that I'm physically like a 20-30 year old, because of physical capabilities. I'm not - it's apples to oranges and at 60 my capabilities are of course degraded. But I think the salient point is that if we do what we can, we can achieve much higher levels than most people would expect.