YouTube added support for 4K video, meaning users can now upload video in resolutions of up to 4096 x 2304 pixels! This resolution offers four times more pixels than 1080p HD.
Today at the VidCon 2010 conference, we announced support for videos shot in 4K, meaning that now we support original video resolution from 360p all the way up to 4K. To give some perspective on the size of 4K, the ideal screen size for a 4K video is 25 feet; IMAX movies are projected through two 2k resolution projectors.
We always want videos on YouTube to be available in the highest quality possible, as creators intend. In December of last year, we announced support for 1080p, or full HD. At 4096 x 2304 pixels, 4K is over four times the size of 1080p. To view any video in a source resolution greater than 1080p, select "Original" in the video quality pulldown menu..