Off course the Germans had flying disks or what people mistakingly call UFO's. After the Nazis decided to call of the 2nd WW - in order to continue their neverending research - they moved to underground bases at the North Pole.
Soon the day will come were the (In the meantime they have mutated to Morlocks) Flying discs will regain control of this world.
Here is the prove:
bmwprag1uq7.jpg
No now for real, IIRC the Germans had a flyingmachine or disc shaped aircraft very simmilar to the Vought XF5U. As for the u-tube film this (UFO) looks to me like someone shoot of a flare (notice the flying curve) which is then dragged away almost horizontal due to the prevailing winds on the carrier. IMO
Regards
Kruska