Here the Best Share for Captain America Civil War (Imax 1080p Blu-ray Version). You can download it by the given below download link.
Codec: MPEG-4 AVC
Aspect ratio: 2.39:1
Original aspect ratio: 2.39:1
English: DTS-HD Master Audio 7.1 (48kHz, 24-bit)
Single disc (1 BD-50)
Region A (B, C untested)
Or also try Direct Download Link: Mirror