The thing that’s pulling you towards the ground right now isn’t the force of gravity, as it’s commonly understood. Instead, you’re being pulled downward because that’s your natural path through spacetime, which is warped by the immense mass of the Earth. This warping primarily takes the form of time passing faster further away from the Earth. Spacetime warping in general also accounts for an object’s inertia and momentum, and we’ll get to that later in the video. How does spacetime warping result in the thing we usually call gravity?

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By the way, at about 3:40 in the video I talk in terms of "hours" that the clocks are ticking off, and I should've clarified that the time difference between clocks a few hundred feet apart on the surface of the Earth is on the order of picoseconds, not hours! Misleading on my part, my apologies.

Here are the other videos I reference about how time dilation causes gravity. They’re really good, but the analogy of a “flow gradient” in time is nonphysical and, I think, just confuses the picture. I’d encourage you to give these a watch and decide which explanation makes the most sense to you: PBS Space Time: Does Time Cause Gravity?:
   • Does Time Cause Gravity?  

Science Asylum: The REAL source of Gravity might SURPRISE you...:
   • The REAL source of Gravity might SURP...  
Physics Videos by Eugene Khutoryansky: Gravitational Time Dilation causes gravitational “attraction:
   • Gravitational Time Dilation causes gr...  

Here’s a video that presents an excellent way to visualize fourdimensional spacetime warping: ScienceClic English: A new way to visualize General Relativity:
   • A new way to visualize General Relati...  

By the way, the animation at 10:43 was made by ScienceClic as well.


Here are excellent YouTube videos to explain each of the four assumptions we start the video with. There are many others that you can also find to supplement your understanding.
1. The three dimensions of space and the one dimension of time are inextricably linked into one dynamic medium: spacetime. TEDed: The fundamentals of spacetime:    • The fundamentals of spacetime: Part ...  


2. Mass warps spacetime in welldefined ways, and warped spacetime moves mass in welldefined ways. PBS Space Time: The True Nature of Matter and Mass:    • The True Nature of Matter and Mass | ...  

3. In the absence of external forces, masses follow geodesics in spacetime; that is, they follow the path of least local distance through spacetime. Veritasium: Why Gravity is NOT a Force:    • Why Gravity is NOT a Force  

4. Part of the warping of spacetime by mass involves time moving more slowly as you get spatially closer to the mass, so that for example clocks on the surface of the Earth tick more slowly than clocks on the international space station. (This is known as time dilation). PBS Space Time: How Does Gravity Warp the Flow of Time?:    • How Does Gravity Warp the Flow of Time?  




Late in the process of making this video, I found this paper published in 2017 in the European Journal of Physics by Stannard et. al. that gives quite a similar graphical explanation of objects following spacetime geodesics in curved spacetime: https://iopscience.iop.org/article/10.... It also has some additional analysis, including deriving a solution to Einstein’s Field Equations (that was published by Karl Schwarzchild in 1916) from the geometrical picture given. I can’t say that I was inspired by this paper in the making of this video, but finding it did quite reassure me that what I’m putting forward is correct!