TRUE 4K MASTERING / HDR SCREENSHOTS THE LIST of movies is the very best in 4K viewing from a physical disc. The criteria required the source to be mastered in 4K or higher and nothing less. No upconversion from 2K to 4K on this list. A big surprise, most of the top 4K discs were originally captured on 65mm or 35mm film stock. Warner Bros. Home Entertainment just edged out Universal Pictures with the most 4K titles in our Top 10 and honorable mentions. While Arrow Video,