I agree. It is good to be skeptical - as they say extraordinary claims require extraordinary evidence. Experts are trained to be skeptical. I am not saying that video may not be a fake but I am also equally skeptical about all the expert opinion on the impossibility of it all. And that is because experts have a long tradition of often being dead wrong about what is possible. Lord Kelvin - who was England's top scientist and President of the Royal Society flatly stated in 1895 that "Heavier-than-air flying machines are impossible" - just a decade before he was proven wrong.
There are many more similar examples in the history of progress. It is a good thing inventors also have a long tradition - of ignoring experts and just trying to achieve what has been claimed as impossible.