@YouTube why is my video playing back at 420p? It's a high definition video and should play back at 1080. My default settings when I play back any other video is HD. This video was uploaded in HD but for some reason defaults to 420p. I have check this on multiple computers.
The availability of HD may take a bit longer than other resolutions. We are working to improve this! If you prefer to wait for availability of HD, you can upload your video as unlisted and make it public once that resolution is available.