YouTube users can now livestream video at up to 4K resolution. YouTube has supported 4K playback since 2010, but today marks the first time users are able to stream 4K video live.
Today, we’re proud to say that we’re taking 4K video one step further with the launch of 4K live streaming for both 360-degree videos and standard videos.
Supporting this new format will let creators and partners stream incredibly high-resolution video, and let viewers enjoy the clearest picture possible when watching a live stream on 4K-supported devices.
Via YouTube blog.