For a small number of people, Google briefly tested a change to YouTube Premium that would make 4K videos unavailable to free users. YouTube has supported 4K videos since 2010, years before the ...

Update (Oct 18, 4:38 pm ET): YouTube's testing ends, removing the paywall behind its 4K video quality. YouTube appears to be in the process of delivering a 4K resolution option to Premium members.

Earlier this month, YouTube ran an experiment where it asked some free users to upgrade to a premium account to watch videos in 4K resolution. The company has now ...