At VidCon 2010, YouTube announced that they will be launching a whole new level of HD streaming.
By selecting the “original” setting, users will be able to watch videos in up to 4096×2304 resolution (4x the resolution of 1080p and used by Digital Cinema and UHDTV). About 10% of all YouTube videos are in HD quality, making it one of the largest HD video sites in the world.
Initially there was some confusion on using the term “4K”, but unlike earlier video formats which are specified in terms of vertical resolution (e.g. 1080p or 1920×1080 resolution), Digital Cinema formats are specified in terms of horizontal resolution. Vertical resolution varies with the aspect ratio of the content. The “2K” format has been used for recent major motion pictures, however, the “4K” format is gaining prominence.
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