I downloaded the movie after seeing it in theatre to once again enjoy it from the comfort of my home. Seeing 2160p, I thought it’s going to be a webcam rip but the title says webrip. Where is this leaked from that has Dolby Vision on a movie still in theatre?
if you have a good camera (2x number of pixels, and 2x colordepth than the movie), then you could make a camrip with perfect quality (assuming some calibration frames, and a cinema that gives no fuck). https://en.wikipedia.org/wiki/Nyquist–Shannon_sampling_theorem
though I guess that’s still too much effort for most, and most early leaks are digital copies, as the other comments suggest.