you made an error at the end of the video where you introduced F=m x a originaly you had a mass of 70kg which gave you 686 newtons but when you mentioned jumping off of a building you had a mass of 68kg but still had the same newtons..

I am struggling to work out how you got 9.8m/s2 from G x mass of the earth divided by the distance... Mass of the earth is 5.9736x10^24kg the distance between the crust and center of the earth is 4.0577294x10^12 meters... how the hell is 6.674x10^-11 x 5.9736x10^24 / 4.0577294x10^12 = 9.8m/s2

What is gravity?

gret

Explained well and understandable when going through calculation stages.

Clearly described and understandable

is gravity pulling (Newton) or is it pushing (Einstein) our mass (you and I) to the earths mass? these two terms pulling and pushing are being used confusingly in physics to define the force, so could it be both, since both masses are acting on the other?

How to get the gravitational force = 9.8 m/s2

Basic but nicely explained

Very well explained