The theory is warping spacetime, that's the explanation we have currently. Newton used an equation to show what's happening, while Einstein theorized it's due to the warping of spacetime -- a 4th dimension we cannot see. In fact, large objects such as the Sun and planets aren't the only masses that warp the fabric of spacetime. Anything with mass—including your body—bends this four-dimensional cosmic grid. The warp, in turn, creates the effect of gravity, redirecting the path of objects that travel into it. The strength of gravity depends on the size of the space-time warp. A large object with little mass creates a smaller distortion than a tiny object with a huge mass. So by definition if you have mass you have a bending of space-time. It is impossible not to bend space time.

Within an atom are positive and negative particles (protons and electrons). Protons and neutrons possess mass, electron mass is negligible. The more protons + neutrons, the heavier the atom, and so the more it warps space-time.

@Duddy, does this illustration align with the idea of space-time?

 
The concept of using fabric of spacetime may use only for illustration purpose, since fabric could relate to magnetic field or attracted force between positive and negative charges in physical matter.  is there no more new concept to describe the fabric of spacetime in more details at this present moment?

Do you have any suggestions?
Thanks, to everyone very much for any suggestions (^v^)

Could fabric of spacetime be described as share direction of electric's magnetic field with other electrons as shown on video?

Thanks, to everyone very much for any suggestions (^v^)

Firstly, gravity and magnetism are not the same thing; they are two different topics. Gravity is a force that acts between any two objects with mass, as described in Newton's law of gravity. Magnetism can either pull the two objects together or push them apart, depending on which way the magnets point. With gravity, Newton found that regardless of what the objects are made out of (even plastic), they attract each other if they have mass. The reason it seems like gravity only pulls you towards the earth is because the earth is so big that the pull from you on earth itself isn't enough to do much to its motion.

Unlike gravity, which occurs between any objects, magnetism depends on specific properties of objects. As mentioned already, magnetism can either pull the two objects together or push them apart, depending on which way the magnets point. Most importantly, it depends on what is going on with the electrons in the material, since each electron is like a tiny magnet itself. Most materials feel very little magnetic force because their electrons act like magnets that are pointing every which way, more or less equal numbers pulling or pushing.

In some materials, the electrons can lower their energy by lining up magnetically into magnetic domains. In each domain, most of the electrons pull and push together, so you can get big forces. In some materials (permanent magnets) the domains can all be lined up so you get really big magnetic forces. If you measure very carefully, however, you find that there are small magnetic forces between magnets and 'non-magnetic' materials like pieces of copper or pieces of wood or people. Some of those 'non-magnetic' things are attracted to magnets and others are repelled.

Both magnetism and gravity can affect objects at a distance. Both get weaker as the objects get farther apart. This is why you are affected by the pull of gravity from the earth, but not from distance planets. It's also why two magnets may move together if you set them near each other, but if you set them far apart nothing will happen. However, as two objects get far apart, the gravity between them goes down by a factor of four when you double the distance, but the magnetic force goes down by (at least) a factor of sixteen. On the scale of the solar system, with planets far apart, gravity is much more important than magnetism.