its not possible to go over 28mph unless they got it in km or wrong wheel size or some mod. I weigh 116 pounds at time of that video and couldnt push it past 28
So it's the same stock top speed after you maxed it out in the settings? Looks like the same controller set up as a bunch of other ebikes. Does setting speed limit to 100 not fully unlock it?
its only pushing out max 1,500watts which is about 28mph maybe 32mph depending on motor gearing as it is plastic inside. Some people claim to get 35mph out of it how is beyond me.