That's all assumption, objects, such as a quarter, fall because they are heavier than the air in which surrounds them, the same way as a helium balloon rises, it rises because it is lighter than the air in which surrounds it. Dropping and object has absolutely nothing to do with "gravity", it's buoyancy and density. Did you even watch the video? I covered this quite clearly.

I should also add that the theory of gravity by definition is a hypothesis, and a hypothesis cannot be a fact.. a hypothesis is a hypothesis, and a fact is a fact. And regardless of its so called definition, if you cannot provide a practical example and physically show gravity, then it is irrelevant, scientific claims must be observable, testable and repeatable every time. Otherwise, it is pseudo science.

Another thing that I will add to this is that "gravity" does not provide measurable curvature. Therefore it is also a fallacious argument.