Thanks for sharing. Every video becomes a bit better regarding the presentation. In that respect, the only niggle was the bell, which sounded like it wasn't adjusted right, so it didn't ring properly. It sounded bad, and you said it was really good. One thing I do need to say though is that the video is more like an advert than a review.
The bike, as you presented it, is fundamentally flawed. I'm really surprised that it got into production like that. They designed it with a sort of double seat and rear suspension, then they added that extra seat, which completely locks the swinging arm from going up and down, so the suspension can't work. What's worse is that the supports for that seat are not triangulated, which means that instead of a structure, it will try to work as a mechanism. The front fixings under the main seat will come loose and make the rear seat support bang against the under-side of the seat frame. If the bolts don't come loose, that seat support will suffer metal fatigue and snap unless it's made of steel (frame material not mentioned anywhere). The seat structure should have been done more like the Pro version, but that brings the next problem that foot-rests on a swinging arm are very unpleasant to use because of the way they bounce up and down. If you've ever experienced that, you'd know what I mean. Also, they fold the wrong way. One bump and your feet will be off. They should fold upwards and be hung from a non-sprung part of the frame, like they are on any motorbike.
One thing that bothers me on these cheap bikes with small wheels is the gearing. It's often much too low. It would have been nice if you had commented on that. Also, your pedalling didn't look very natural. Your knees were too high and it didn't look like you had an even cadence. Were you air-pedalling?