Okay yes your right. In the video it explains afew methods how this field may be generated. The other one is that when is matter moving though a this unkown field. It Would induce movement in that field and a magnetic field would be generated. But only if that field has a charge and a electric field.
So the magnetic field is only being produced in areas containing matter. As gravity still exists matter will form clumps in the field keeping the galaxies together. However you will also be generating a additional force via repulsive at the subatomic level as all the particles are is moving and rotating though the field.
It would be the matter of our universe moving through the field at high speeds. The only movement in the field would be the matter passing through it. When a bullet shoots out of a gun, the air isn't moving at the same speed as the bullet.
Think of it as you swimming through water. As you start moving through the water. You generate movement in the water. Inducing a weak magnetic field, as you are diamagnetic, you will be repulsed by the magnetic field. Allowing for all the atoms in you body from comming in contact with the water. Allowing for you to pass though the water.
The video isn't great. But it may help. Doesn't have any sound , just text. Also iv heard that some people are calling you evil. 😂. Seem like a cool dude to me.
I have seen these speculations. To me they seems highly implausible. The big bang model seems the right way to go. All I'm doing with it is speculating this field existed before the big bang. And apart from a big bang it was a flood of electromagnetic energy comming from the field side. Leading to The Breit–Wheeler process forming matter and antimatter.
So we are built inside the DM and DE. Spreading into it and not expanding.