Even though most of us are only just now starting to look at 4K / Ultra HD, YouTube has had support for the high-res video since 2010 (just two years after it started streaming in HD!).
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YouTube makes sure you know 4K videos are out there
Even though most of us are only just now starting to look at 4K / Ultra HD, YouTube has had support for the high-res video since 2010 (just two years after it started streaming in HD!).
Full article