YouTube 1080p HD Video Streaming Now Live

Yes, starting today "YouTube's HD mode will add support for viewing videos in 720p or 1080p, depending on the resolution of the original source." Continue reading for a sample video.
It seems that some videos that were previously uploaded in 1080p have already been converted. The above video has been confirmed to be streaming at full 1080p.
[via OhGizmo - Y-T]

....

- Source : http://www.techeblog.com