The fundamental gravity theory from Newton and Einstein are detailed, along with some of the visuals used to understand the General Relativity Theory of Gravity.

Kerala School of Astronomy and Math
https://en.wikipedia.org/wiki/Kerala_School_of_Astronomy_and_Mathematics

Rishi Kanada Vedic Nuclear Scientist
http://mailonnews.com/2017/09/19/manchester-university-research-confirms-this-is-how-isaac-newton-stole-concept-of-gravity-from-a-hindu-gurukul-in-india/

General and Special Relativity https://youtu.be/AwhKZ3fd9JA

Gravity Visualized Video https://youtu.be/MTY1Kje0yLg