For WEB-DL 4K IMAX of Infinity War , you might see:
“UP D” signals this is not the first release. Early 2020 WEB-DLs of Infinity War IMAX had issues: avengers infinity war 2018 imax 2160p webdl upd
Infinity War was shot entirely with IMAX-certified Arri Alexa 65 and IMAX IW1 cameras. The theatrical IMAX release featured shifting or constant expanded aspect ratios. For years, home releases (Blu-ray, standard streaming) presented the film in 2.39:1 letterboxed, cropping the top and bottom. For WEB-DL 4K IMAX of Infinity War ,
digital cameras. The specific tag "2160p WEB-DL" refers to a high-quality 4K digital rip often associated with the film's "IMAX Enhanced" version now available on The IMAX Difference: 1.90:1 Aspect Ratio home releases (Blu-ray