Survivorman (Les Stroud) didn’t have a cameraman; he filmed himself.

This renews my desire to make a giant Penrose tiling on my floor.

Unfortunately, delusions generally don’t work that way. Even after this proof of nothing under the floorboards, the delusion will persist, potentially slightly changed. Eg, they were under the floor but not now, or now they’re in the attic, etc.

You generally can’t reason someone out of a delusion without significant therapy and/or medication.