The "4K UPD" (4K Updated) tag indicates that the original footage has been remastered or re-released in Ultra High Definition (4K) resolution Technical Meaning of "4K UPD"

The manufacturer's website often lists official release schedules for 4K remasters. 3. Hardware Requirements

: Highlight the jump to 4K resolution , which provides four times the detail of standard 1080p. Discuss the clarity of textures and the benefit of higher bitrates often found in "UPD" (updated) releases.

In HandBrake:

However, looking at the terminology, this string often appears in databases for specialized video media