I think it is more likely one of those 100 mil silver plated "Tribute Proofs".
And he does know it's fake. He says the shininess of the coin makes it impossible to see the bottom of the coin in the first picture of the reverse, but you can tell it has been deliberately blurred out not missing from glare. Then he posts a second reverse picture wihich is obviously a different coin. No shiny proof surfaces at all.