Yep - you only got vids when the next gen stuff was already being tested.
From that vid, simply off the top of my head as a fairly none tech - we have thrust, weight, size, radar signature, several of the control frequencies, a small amount of the actual control systems used, probable loadout and flight duration. You can make an estimate of what coating is used. Hell - you listen to the engines fire up, look at the geometry and you know the performance envelope.
Obama is an bleep. Not that that would be news to anyone here.