I can't believe I wasted almost 9 minutes watching that stupid video. It bugs me that we see the speed controller twice, but not the motor, and of course, not the original "bike" that was returned.
As an adult, I cannot imagine why any able-bodied person would buy something like that, even as a toy for a child. Yes, you would have to be foolish to think that something with 20" wheels could even hit 30MPH without being dropped from a tall building. Even 20MPH would be a stretch - that's just basic math. It would appear that some people have an insatiable appetite for Chinese made junk, which causes them to ignore the obvious marketing hype.