Okay, so, because I like to pick nits...
What he says is they, "...do not hold any missing episodes...".
So, it could be that known copies of episodes could exist, but are not yet in their holdings! So, for example, if there were negotiations going on as to the price to be paid for those copies?
(Because letting it go is no fun.)
He's clearly a bit emotional (probably being right at the sharp end of the hoax) and imprecisely his language, but I think "They are not missing but destroyed. The end." is pretty clear.