Copy and paste this into Archive.org's search bar:
(mediatype:movies) AND (4k OR "2160p" OR "3840x2160") AND format:mp4 4k movies archive.org
Founded by Brewster Kahle in 1996, the Internet Archive is a non-profit digital library offering free public access to collections of digitized materials, including websites, software, games, music, and moving images. Unlike torrent sites or pirate bays, Archive.org operates strictly within the bounds of . Copy and paste this into Archive
For the average consumer looking for the latest blockbuster in HDR10+? 4k movies archive.org