This awesome video screencast of Ubuntu Unity interface in the latest developmental release of Ubuntu 11.04 Natty Narwhal was made by Jono Bacon, Ubuntu community manager.
New Ubuntu Unity Video Preview
Ubuntu 11.04 codenamed "Natty Narwhal" is perhaps the most important Ubuntu release as far as Canonical is concerned. Wondering what makes this release so very special? You need to read this - 6 things to look forward for in upcoming Ubuntu 11.04 Natty Narwhal.