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

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