A Manager at Lilium HQ have said it was their full scale 2 seater used on the maiden flight video and that the video contains pictures from multiple flights.
You could estimate the craft dimensions from the drone shot with the tech laying underneath.
I'll ask about weight but don't hold your breath
One assumes their plan for world domination has factored in the prospect of evolving battery efficiencies.
Pity they didn't show an unedited flight from takeoff to landing. I've suggested they release an unedited shot from the camera drone that was also airborne.
Mickjoebill