Gravity or gravitation, is a natural phenomenon by which all things with mass or energy, are brought toward one another. On Earth, gravity gives weight to physical objects.
Gravity has an infinity range, although its effects become increasingly weaker on farther objects. While gravity is one of the most researched subjects, there are also studies that try to discover the dark side of gravity.
All our life we have been taught that gravity is something positive, and part of our lives. But the hypothesis explained in the video, implies that gravitational phenomena has additional effects which are not being taken into account by general relativity.
These effects are negligible, considering fields such as those corresponding to the Earth. But should be taken into account for stronger ones, such as black holes.