The former video:
According GBATEMP's claim, it is some kind of slot1 hardware, as you can see below:
"I've just been confirmed by a reliable source (who wishes to remain anonymous) that this is not a hoax and is currently a WIP. It is a new slot1 card that will be announced shortly! Unfortunately we're not able to divulge any more information! But we'll remain sceptical until we have the product in our hands to test for ourselves."
more through the link: