I have now watched the vid
The dark brain stuff is semantic nonsense, the "BRAIN" includes your eyes they are connectedpart of the same organ, so the "BRAIN" experiences light directly, they are talking about processing not exprience.
Also the "BRAIN" is not confined to your head this is a common misunderstanding because of people's tendency to compartmentalise stuff. Your "BRAIN" is really a network of fine sensors "neurones" that extend throughout our entire body. Your fingers your tongue and other bits are full of nerve cells that are directly connected to your processing centre otherwise known as the "BRAIN"so experience is not completely processed in one small space, who is to say that reality is not a result of all of the movements of chemicals and electrons inside a living organism?
Solipsism is a powerful idea but it's not convincing as you get older![]()