ProRes 422 HQ with black background. Use blending modes or an unmult effect to remove the background.

Resolutions: 6K (3456x6144) and 4K (2160x3840) 
Frame Rate: 50fps
Formats: ProRes 422 HQ with black background
Length: 15 seconds
Colour space: Rec 709
Camera: Blackmagic URSA Mini Pro 12K