: This indicates it is a "remux" of a Blu-ray Disc. The video and audio data have been taken directly from the disc without being re-compressed, meaning it retains the original maximum quality of the physical media. 2160p : This is 4K resolution (
: This is a specific type of Dolby Vision metadata. Profile 8 is designed to be backwards compatible, allowing the file to play in HDR10 on devices that don't support Dolby Vision.
: Stands for High Dynamic Range , which provides better contrast and a wider range of colors.