Interesting video, but SO flawed. If you hold up a mirror, is the image in the mirror just perceived? Or is it a copy of actual reality? The same holds true for the images perceived in your brain. Your brain is acting as a mirror and recorder of the actual reality around you. Although there can be many slight variations of that perceived reality among different people, depending on how the information interacts with other parts of the brain.
If I see a brown duck gliding across a pond, and a hundred other people also see a brown duck gliding across a pond, the reality is not just in my head. It is a record of the reality outside of my head. Unless of course those hundred people are also just in my head. Ouch!