The description of the video says "An entirely new origin awaits. A new way of playing."
But there is nothing "new" about the Dragonborn "way of playing" ... We allready had Sorcerer ... And we allready have Astarion ...
If this is the hint ... and im just speculating wildly ... What IF they are talking about the Goblin?
Possible. The last origin in DOS2, Fane, was also something special. Its possible that the last origin in BG3 is the goblin who instead of just using face masks, lets us mind control basically anyone in the game and use them as vehicle.
Or the dragonborn is fixed and we have more of a master-blaster situation.
