: Indicates native 4K resolution (3840 x 2160 pixels), offering four times the detail of standard 1080p HD.
: Usually stands for "Updated" . This often refers to a newer version of a digital file that might include fixed subtitles, better HDR metadata (like Dolby Vision), or a refined audio track compared to the initial release. The Quest for the Home IMAX Experience avengers infinity war 2018 imax 2160p webdl upd
In the context of digital releases, these technical tags provide specific information about the file quality and source: : Indicates native 4K resolution (3840 x 2160
: Stands for a "Web Download," typically a lossless rip from a streaming service like Disney+ or Apple TV, which preserves the original stream's quality without re-encoding. better HDR metadata (like Dolby Vision)